GE PACSystems RX7i

Chapter 6. Service Request Function
GFK-2950C February 2018 323
6.25 SVC_REQ 24: Reset Module
Use SVC_REQ 24 to reset a daughterboard or some modules. Modules that support SVC_REQ 24
include:
RX3i IC693BEM331, IC694BEM331, IC693APU300, IC694APU300, IC695ETM001, IC693ALG2222,
IC694ALG2222, IC695PNC001
RX7i: Embedded Ethernet Interface module, IC697BEM731, IC698BEM731, IC697HSC700,
IC697ALG230, IC698ETM001
The SVC_REQ output is set ON unless one of the following conditions exists:
- An invalid number for rack and/or slot is entered.
- There is no module at the specified location.
- The module at the specified location does not support a runtime reset.
- The CPU was unable to reset the module at the specified location.
For this function, the parameter block has a length of 1 word. It is an input parameter block only.
Address
Module slot (low byte)
Module rack (high byte)
Rack 0, Slot 1 indicates that a reset is to be sent to the daughterboard.
Note: It is important to invoke SVC_REQ #24 for a given module for only one sweep at a time. Each
time this function executes, the target module will be reset regardless of whether it has
finished starting up from a previous reset.
After sending a SVC_REQ #24 to a module, you must wait a minimum of 5 seconds before
sending another SVC_REQ #24 to the same module. This ensures that the module has time
to recover and complete its startup.
SVC_REQ 24 Example
This example resets the module in
rack0/slot 2.
In rung 1, when contact %I00200 is
closed, the positive transition coil sets
%I00250 to ON for one sweep.
The MOVE_WORD instruction in rung 2
receives power flow and moves the
value 2 into %R00500.
The SVC_REQ function in rung 3 then
receives power flow and resets the
module indicated by the rack/slot value
in %R00500.