LG Electronics 120S user manual Data relay D, App2-4

Appendix 2 Flag List

3) Data relay (D)

When communication function is used, its status are stored in D register, and they can be monitored. And If correspond communication function is unused, these flags can be used as general data register.

(1) When FNET module is connected

Relay	Keyword	Function		Description
D4500	_C0STNOL	Communications module		Indicates the number which is set on communications module station
				switch.
D4502	_C0STNOH	station No.
				Fnet : Station switch No. marked on the front of communications module.
		Communications frame		Increments by one whenever sending error of communications frame
D4504	_C0TXECNT			occurs.
		sending error
				Connection condition of network is evaluated by this value.
		Communications frame		Increments by one whenever receiving error of communications frame
D4505	_C0RXECNT			occurs.
		receiving error
				Connection condition of network is evaluated by this value.
		Communications service		Increments by one whenever communications service fails. Connection
D4506	_C0SVCFCNT			condition of network and overall communication quantity and program
		processing error
				stability can be evaluated by this value.
D4507	_C0SCANMX	Maximum communications		Indicates the maximum time that is spent until every station connected to
		scan time (unit : 1 ms)		network has the token at least one time and sends a sending frame.
D4508	_C0SCANAV	Average communications		Indicates the average time that is spent until every station connected to
		scan time (unit : 1 ms)		network has the token at least one time and sends a sending frame.
D4509	_C0SCANMN	Minimum communications		Indicates the minimum time that is spent until every station connected to
		scan time (unit : 1 ms)		network has the token at least one time and sends a sending frame.
D4510	_C0LINF	Communications module		Indicates operation state of communications module with a word.
		system information
D4510.B	_C0CRDER	System error (error = 1)	Indicates communications module hardware or system O/S error.
D4510.C	_C0SVBSY	Insufficient common RAM		Indicates that service cannot be offered due to insufficient common RAM.
		(Insufficient = 1)
D4510.D	_C0IFERR	Interface error (error = 1)	Indicates that interface with communications modules has been stopped.
D4510.E	_C0INRING	In-ring (IN_RING = 1)		Indicates that the communications module can communicates with other
				station or not.
D4510.F	_C0LNKMOD	Operation mode (RUN=1)		Indicates that operation mode of communications module is in the normal
				operation mode or test mode.

App2-4