CH 1 OK
The CH 1 OK LED is the middle LED. It operates identical to the Module OK LED in that it is ON after the board has successfully completed the power-up diagnostics and OFF if a failure has been detected during the power-up diagnostics, or if its bus or bus controller fails while the CPU is running (even in the STOP mode). If the failure is a bus controller failure, the LED will remain permanently off. If it is a bus failure, such as a broken wire or excessive bus errors, the LED remains off until the failure condition is corrected.
GBC Connectors
A GBC has two connectors. Directly below the LED is a dedicated nine-pin connector for connection to the Hand-Held Monitor. The actual bus connections are made through a 12 point removable terminal board. Six of these terminals are used for connection to the Genius I/O channel. The GBC may be located on either end or in the middle of the bus.
PRIMARY UNIT
P | C B | R | G G | G |
S | P T | C | B B | B |
| U M M C C | C |
| SECONDARY UNIT | | | a47007 |
| | | | |
| | | | | |
| | | | |
P | C B R G G G | | | |
S | P T C B B | B | | | |
| U M M C C | C | | | |
Genius Bus
Genius Bus
Genius Bus
Genius Devices
Genius Devices
Genius Devices
Figure 7. Example of Multiple Genius Busses in a Hot Standby CPU Redundancy System
Racks
The standard series 90-70 I/O racks may be used to contain the modules in a Hot
Standby CPU Redundancy System.. These racks include the following:
HIC697CHS750, 5-slot rear mount;
HIC697CHS790, 9-slot rear mount;
HIC697CHS791, 9-slot front mount.
Note
Please note that he Series 90-70 VME Integrator racks (IC697CHS782 and IC697CHS783) are not supported by this release of the Hot Standby CPU Redundancy product.
For detailed information on the Series 90-70 I/O racks, refer to GFK±0262, the Series 90-70 Programmable Controller Installation Manual.
26 | Series 90-70 Hot Standby CPU Redundancy User's Guide ± December 1993 | GFK-0827 |
