GE 90-30/20/Micro manual Svcreq #13 Shut Down Stop PLC

4

SVCREQ #13: Shut Down (Stop) PLC

Use SVCREQ function #13 in order to stop the PLC at the end of the next sweep. All outputs will go to their designated default states at the beginning of the next PLC sweep. An informational fault is placed in the PLC fault table, noting that a “SHUT DOWN PLC” function block was executed.

The I/O scan will continue as configured.

This function has no parameter block.

Example:

In the following example, when a “Loss of I/O Module” fault occurs, SVCREQ function #13 executes. Since no parameter block is needed, the PARM input is not used; however, the programming software requires that an entry be made for PARM.

This example uses a JUMP to the end of the program to force a shutdown if the Shutdown PLC function executes successfully. This JUMP and LABEL are needed because the transition to STOP mode does not occur until the end of the sweep in which the function executes.

LOS_MD %T0001

—— ——————————————————————————————————————————————————————————————————————(−)—

		_____
%T0001
—— ——————— SVC_——————————————————————————————————————————————————>> END_PRG
		REQ
	CONST —FNC
		0013
	%R1001 —PARM
		_____
.
.
.
END_PRG:
[		END OF PROGRAM LOGIC	]

Note

To ensure that the %S0002 LST_SCN contact will operate correctly, the PLC will execute one additional sweep after the sweep in which the SVCREQ function #13 was executed.

4-154 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K