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⟦e4cfd5186⟧ Wang Wps File
Length: 16616 (0x40e8)
Types: Wang Wps File
Notes: WATCHDOG H/W REQ.SPEC.
Names: »0814A «
Derivation
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WangText
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…11……06……10……0d……10……02……86…1 …02… …02… …02…
…02…CPS/SRS/003
CAMPS WATCHDOG H/W REQUIREMENTS…02…SRA/810624…02……02…#
SPECIFICATION
…02…Issue 1…02…CAMPS
T̲A̲B̲L̲E̲ ̲O̲F̲ ̲C̲O̲N̲T̲E̲N̲T̲S̲
1 GENERAL................................ 4
1.1 SCOPE.............................. 4
1.2 APPLICABLE DOCUMENTS............... 4
1.3 ACRONYMS .......................... 4
2 REQUIREMENTS........................... 6
2.1 CONFIGURATION (CPS H/W)............ 6
2.2 PU SUPERVISION AND CONTROL......... 9
2.3 CU SUPERVISION AND CONTROL......... 12
2.4 TDX SUPERVISION AND CONTROL........ 17
2.5 WDPU REQUIREMENTS.................. 23
3 RESUME................................. 24
1̲ ̲ ̲G̲E̲N̲E̲R̲A̲L̲
1.1 S̲C̲O̲P̲E̲
The scope of this document is to baseline the H/W requirements
to the CAMPS-Watchdog system. The requirements reflect
the fact that the CAMPS equipment is enclosed within
an EMI-shield and thus invisible to users during normal
operation. The watchdog monitor/control facilities
addressed in this document should, along with appropriate
offline M&D S/W modules enable an operator to identify
a faulty subsystem (Processor Unit, Channel Unit or
TDX Unit) and perform trouble shooting down to module
level via the operator console.
1.2 A̲P̲P̲L̲I̲C̲A̲B̲L̲E̲ ̲D̲O̲C̲U̲M̲E̲N̲T̲S̲
- Watchdog Technical note, CSD/005/TNO/0006
- CAMPS Requirements Spec. CPS/210/SYS/0001
- CAMPS System Design Spec.CPS/SDS/001
- Configuration Control Adapter CSD/005/PSP/0067
- LTU CSD/005/PSP/0074
- WCA CSD/005/PSP/0065
- MAP CSD/005/PSP/0037
- MIA CSD/005/PSP/0058
- TDX Controller CSD-MIC/005/TCM/0015
- BSM-X CSD-MIC/005/PSP/0029
- CCA CSD/005/PSP/0067
1.3 A̲C̲R̲O̲N̲Y̲M̲S̲
ADIS(L) I/O Bus A Disable (active low)
AENA I/O Bus A Enable
ALLEN(L) All Enable (active low)
AUT Automatic
AUTO(L) Automatic (active low)
BDIS(L) I/O Bus B Disable (active low)
BENA I/O Bus B Enable
BS Bus select
BSM-X TDX Bus switch & Monitoring module
CADIS(L) CU A Disable (active low)
CBDIS(L) CU B Disable (active low)
CC Controller(TDX) Connected
CCA Configuration Control Adapter
CCB Configuration Control Bus
CI1 Control Input 1
CI2 Control Input 2
CIA Data Channel Interface Adapter
CO1 Control Output 1
CO2 Control Output 2
CPS CAMPS
CU Channel Unit
ECL(L) External Clear (active low)
EMI Eletromagnetic Interference
EMM(L) External Maintenance Mode (active low)
FS Fuse Status
GND Ground
H/W Hardware
IADIS Internal A Disable
IBDIS Internal B Disable
LED Light Emitting Diode
LTU Line Termination Unit
LTUX Line Termination Unit - TDX
MAP Memory Mapping Unit
MIA MAP Interface Adapter
NC Normally Closed
OP Outlet Power
PROM Programmable Read Only Memory
PU Processor Unit
PUAEN(H) PU All Enable (active high)
PUDIS(L) PU All Disable (active low)
RS Receiver Status
TDX Telecommunication Data Exchange
TDX#1 Select TDX Bus#1
TDX#2 Select TDX Bus#2
TIA TDX Interface Adapter
TOA(L) Take ownership auto (active bus)
TS Transmitter Status
TU TDX Unit
VDU Visual Display Unit
WCA Watchdog Controller Adapter
WDCC Watchdog Control Channel
WDPU Watchdog Processor Unit
2̲ ̲ ̲R̲E̲Q̲U̲I̲R̲E̲M̲E̲N̲T̲S̲
2.1 C̲O̲N̲F̲I̲G̲U̲R̲A̲T̲I̲O̲N̲ ̲
The CAMPS H/W configuration shown in fig. 2.1-1 to
be monitored and controlled by the CAMPS-Watchdog system
consists of:
- A dualized set of Processor Units
(PU #1 and #2)
- A dualized I/O Bus structure (Data Bus A and B)
within a channel unit (CU)
- A dualized TDX Bus structure (TDX Bus #1 and #
2)
- A number (max. 10) of TDX units (TU)
Each PU with its associated Data channel and Data Bus
is considered either active, stand-by or off-line.
Only one PU can be active at any time.
During normal operation one PU is the active PU and
the other is the stand-by PU ready to enter the active
state if the initial active PU fails.
The H/W elements of the Watchdog system, as shown in
fig. 2.1-2, are:
FIG. 2.1-1…01…CAMPS H/W CONFIGURATION
FIG. 2.1-2…01…WATCHDOG SYSTEM H/W ELEMENTS
- The Watchdog Processor Unit (WDPU) which consists
of a Watchdog Controller Adapter (WCA) and a LTU,
two Watchdog Control Channels (WDCCs) which are
V24/V28 communication channels and two external
V24/V28 communication channels, used for a VDU
+
keyboard and a lineprinter.
- The configuration control bus (CCB)
- Three configuration control adapters (CCAs)
- A number of TDX Bus switching and Monitoring modules
(BSM-Xs, max. 10)
The WDPU communicates with the different CAMPS elements
in two ways:
- Through the WDCCs
- Through the CCB and the CCAs/BSM-Xs
The WDCC has different communication purposes in the
CAMPS system. During system start up it is the communication
path between the operator console and the system monitor
and/or bootload procedures. During normal operation
it transfers status information from both the active
and the stand-by PU to the WDPU.
Via the CCAs/BSM-Xs and the CCB the WDPU collects information
from digital/analog input points in individual units
(PU, CU, TU).
The WDPU also controls some functions within each PU,
the CU and the TDX through digital output points on
the CCA/BSM-X.
2.2 P̲U̲ ̲S̲U̲P̲E̲R̲V̲I̲S̲I̲O̲N̲ ̲A̲N̲D̲ ̲C̲O̲N̲T̲R̲O̲L̲
Both the active PU and the stand-by PU will, with fixed
intervals, transmit a status message to the WDPU via
the WDCCs. Transmission and transmission intervals
are performed/controlled by the System Status & Control
(S/W).
The status message from the active PU will reflect
overall system performance, and indicate to the watchdog,
that the active PU is "still alive".
The status message from the stand-by PU will reflect
the stand-by PU condition and inform the watchdog whether
or not the stand-by PU is able to switch to …86…1
…02… …02… …02… …02…
active in case the active PU fails
The active PU will also, if necessary, transmit reconfiguration
commands along with the status message. This would
result in either a TDX Bus switch, a TU isolation or
a PU switch.
Via a CCA in the PU the watchdog shall be able to monitor
the following signals (refer to fig. 2.2-1):
- The + 5v supply
- The + 12v supply
- The - 12v supply
- The PU enable/disable state (PUAEN(L))
- The PU enable signal from the MAP (ALLEN (H))
FIG. 2.2-1…01…MONITOR/CONTROL FACILITIES IN A PU
The watchdog shall also via the CCA be able to issue
the following PU control commands:
- Disable PU (PUDIS(L))
- Maintenance mode (EMM(L))
- Master clear (ECL(L)). This CCA output must be
an open collector (relay) output as the ECL input
on the MAP is grounded directly when activating
the MC push button on the MAP frontpanel.
Thus within a PU the watchdog/CCA shall provide the
following:
- 3 analog inputs:
one + 5v input
one + 12v input
one - 12v input
- 3 digital outputs. It is a requirement that at
least one output (preferably all) is an open collector
(relay) output (refer to Master Clear above).
- 3 digital inputs, as specified in CSD/005/PSP/0067.
2.3 C̲U̲ ̲S̲U̲P̲E̲R̲V̲I̲S̲I̲O̲N̲ ̲A̲N̲D̲ ̲C̲O̲N̲T̲R̲O̲L̲
In the CU we find the I/O controllers, 3 disk controllers,
a floppy disk controller and up to five line termination
units (LTUs). The I/O controllers are all electrically
connected to both I/O Buses but are only assigned to
one of these. An I/O controller is assigned to an I/O
Bus and hereby to the connected PU as a result of a
"Take Ownership" command issued by the PU (The PU claims
the I/O controller).Generally only the active PU is
allowed to own I/O controllers.
During system integration or PU troubleshooting (after
a PU switch over) it will be necessary somewhere in
the procedure to connect (reconnect) a PU to the associated
Data channel (A or B) and hereby to the associated
I/O Bus (A or B). To prevent unintended I/O controller
claims due to errors it shall be possible to disable
the effect of a "Take Ownership" command from either
of the Buses (selectable) on all I/O controllers at
a time. This is achieved via the watchdog and a CCA
in the CU. Furthermore a front crate mounted switch
unit (not yet designed) is involved providing manual
disable/enable of the "Take Ownership" effect. Manual
control on the switch unit overrides watchdog/CCA control.
Via the CCA in the CU the watchdog shall be able to
monitor the following signals (refer to fig. 2.3-1):
- Two +5v supplies
- Two +12 v supplies
- Two -12 v supplies
- "Take Ownership" Control Auto (TOA(L)).
This signal is generated on the switch unit and
indicates whether or not any switch setting will
override watchdog control.
The CCA shall provide the following outputs controlled
from the watchdog processor:
- A Bus disable (ADIS(L)). This signal disables the
effect of a "Take Ownership" command issued via
I/O Bus A.
- B Bus disable (BDIS(L)). This signal disables the
effect of a "Take Ownership" command issued via
I/O Bus B.
FIG. 2.3-1…01…MONITOR/CONTROL FACILITIES IN A CU
Thus within a CU the watchdog/CCA shall provide the
following functions:
- 6 Analog inputs:
Two + 5v inputs
Two +12v inputs
Two -12v inputs
- 2 digital inputs, as specified in CSD/005/PSP/0067.
- 2 digital outputs, preferably open collector (relay)
outputs as the corresponding inputs on the switch
unit may be grounded by switches.
Fig. 2.3-2 shows the switch unit principle.…86…1
…02… …02… …02… …02…
FIG. 2.3-2…01…SWITCH UNIT PRINCIPLE
2.4 T̲D̲X̲ ̲S̲U̲P̲E̲R̲V̲I̲S̲I̲O̲N̲ ̲A̲N̲D̲ ̲C̲O̲N̲T̲R̲O̲L̲
The CAMPS TDX is composed of a dualized TDX Bus structure
(TDX Bus # 1 and #2) and a number of TDX Units (TUs)
holding the TDX Line Termination Units (LTUXs), Line
Adapters (Opto Transceivers or Low Level (6-0-6) V24/V28)
and the TDX Bus Switch and Monitoring modules (BSM-Xs).Through
the BSM-X the TU internal TDX Bus is connected to either
TDX Bus #1 or TDX Bus #2. The Bus selection is controlled
via 2 sources:
- 1. Via the watchdog processor through a CCA integrated
on the BSM-X.
- 2. A set of switches on the BSM-X front panel.
Each of the two TDX Buses has its own TDX controller.
Each TDX Controller supplies 5 status signals giving
information of TDX Bus performance, self diagnostic
results and a fuse status indicating whether the TDX
outlet - interface between the TDX Bus # 1, 2 and the
TU - is powered or not.
The following requirements are applicable for BSM-Xs
connected to a TDX-Controller. The remaining BSM-Xs
have the same inputs/outputs, but will be operated
in accordance with the connected signals (TDX Controller
connected (CC) etc.)
According to the above mentioned functions the CCA
integrated on the BSM-X shall enable the watchdog to
monitor the following signals in a TU (refer to fig.
2.4-1):
- One + 5v supply
- One + 12v supply
- One - 12v supply
- An Auto (L) signal indicating that the auto/manual
switch on the BSM-X front panel is in Auto mode
not overriding watchdog control.
- The five TDX controller status signals. As these
signals are supplied through a 25p cannon connector
on the TDX controller front panel, it is a requirement
that the corresponding 5 inputs to the BSM-X (CCA)
are accessed via a similar connector placed in
the same vertical position on the front panel of
the BSM-X.
- Two additional inputs not yet defined.
- Two input signals, OP1 and OP2 (Outlet Power 1
and 2), indicating whether or not the connected
TDX outlets are powered.
FIG. 2.4-1…01…MONITOR/CONTROL FACILITIES IN A TU
The BSM-X (CCA) shall also provide outputs enabling
the watchdog processor to perform the following:
- assign TDX Bus #1 to the TU internal TDX Bus -
TDX #1(L)
- assign TDX Bus #2 to the TU internal TDX Bus -
TDX #2(L)
- isolate the TU (equivalent to:
neither TDX Bus #1 nor TDX Bus #2 assigned to the
internal TU TDX Bus (TDX #1 and TDX #2 = "H"))
- control the CI1 and CI2 signals to the TDX controller
Thus in a TU the CCA integrated on the BSM-X shall
provide the following:
- 3 analog inputs
one + 5v input
one + 12v input
one - 12v input
- 2 digital outputs for Bus assignment. The BSM-X
hardware should ignore the combination where both
select signals due to an error are active (low).
This combination could be interpreted as an "isolate
TU" command.
- 2 digital outputs used as CI1 and CI2
- 2 additional digital outputs (wrapposts)
- 10 digital inputs, as specified in CSD-MIC/005/PSP/0029.
2 inputs are additional (wrapposts).
One input (the CO2) must be provided with a retriggerable
monostable multivibrator the output of which is sampled
by the CCA. The CO2 signal is alternating reflecting
performance of the TDX Controller internal on-line
diagnostics (pulsetime 6-30 ms).
FIG. 2.4-2…01…BSM-X, 25p CANNON CONNECTOR PIN LAYOUT
2.5 W̲D̲P̲U̲ ̲R̲E̲Q̲U̲I̲R̲E̲M̲E̲N̲T̲S̲
Physically the WDPU is a CR80D minicrate with an integrated
power supply, one LTU module and one WCA module.
The WDPU connects to the CAMPS system via 5 signal
interfaces:
- 4 V24/V28 communication interfaces
- 1 configuration control bus interface.
All connections shall be done via front panels in the
rear crate.
The WCA front panel holds the 4 V24/V28 communication
interface connectors. Another adapter module front
panel holds the configuration control bus connector.
This adapter module shall also provide a CCB connect/disconnect
facility controlled by a front panel mounted switch.
Indication (LED) shall be provided to show switch position
(connect LED on, disconnect LED off).
3̲ ̲ ̲R̲E̲S̲U̲M̲E̲
The previous sections have described a set of CAMPS
hardware control and monitor facilities through which
the watchdog processor/the operator will be able to:
1. Monitor crate power supply voltages
2. Monitor the Enable/Disable state of each PU
3. Monitor whether or not watchdog control of the
CU is overrided by "non auto" switchsettings on
the CU switch unit.
4. Monitor the state of the auto/man switch on each
BSM-X.
5. Monitor 5 status signals from each of the two TDX
controllers indicating initial TDX controller selfcheck
status, TDX Bus performance and TDX outlet power
on/off.
6. Monitor the OP status from each BSM-X.
7. Disable a PU from external Buses.
8. Master clear a PU
9. Control "Maintenance/Normal mode" state of a PU.
10. Disable the effect of a "Take Ownership" command
either from I/O Bus A, I/O Bus B or both.
11. Assign TDX Bus #1 or TDX Bus #2 or none to each
TU individually.
Each watchdog control facility has a manual back up
possibility in the relevant crate(s). This ensures
that CAMPS can be manually configurated as desired
in case of a watchdog failure.
The overall watchdog design allows CAMPS configuration
control to be operated as follows:
- Automatically by the watchdog processor program,
based on status messages from the active PU.
- Manually by the operator via the VDU + Keyboard
and the watchdog processor programs.
- Manually on each crate independent of and overriding
the watchdog.
The described watchdog hardware together with a sufficient
set of off-line M&D software modules resident in the
MAP microprocessor PROM, in the MIA Bootload PROM and
on a Disk Pack, alternatively Floppy Disk, enables
the operator via the VDU + keyboard to perform a step-by-step
troubleshooting procedure down to module level.
