Chapter 6. Service Request FunctionGFK-2950C February 2018 3236.25 SVC_REQ 24: Reset ModuleUse SVC_REQ 24 to reset a daughterboard or some modules. Modules that support SVC_REQ 24include:RX3i IC693BEM331, IC694BEM331, IC693APU300, IC694APU300, IC695ETM001, IC693ALG2222,IC694ALG2222, IC695PNC001RX7i: Embedded Ethernet Interface module, IC697BEM731, IC698BEM731, IC697HSC700,IC697ALG230, IC698ETM001The 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. Eachtime this function executes, the target module will be reset regardless of whether it hasfinished starting up from a previous reset.After sending a SVC_REQ #24 to a module, you must wait a minimum of 5 seconds beforesending another SVC_REQ #24 to the same module. This ensures that the module has timeto recover and complete its startup.SVC_REQ 24 ExampleThis example resets the module inrack0/slot 2.In rung 1, when contact %I00200 isclosed, the positive transition coil sets%I00250 to ON for one sweep.The MOVE_WORD instruction in rung 2receives power flow and moves thevalue 2 into %R00500.The SVC_REQ function in rung 3 thenreceives power flow and resets themodule indicated by the rack/slot valuein %R00500.
