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SHEETDESCRIPTIONDESIGN DATE EDIT
01
02.06.21
Mutai First issue
TITLE
Addition of Machine Remote Diagnosis
and Unsolicited Message
B-63644EN/02-3
FANUC LTD.
DRAW.NO.
3.2. Time-chart of signals
This section explains the flow of controlling Unsolicited Message function.
REQ (Ladder -> CNC)
COM (CNC -> Ladder)
RES (CNC -> Ladder)
RES_CODE (CNC-> Ladder)
(b)
(c)
(d)
(e)
(a)
(f)
(g)
T he m essage transm ission
has been finished
The response
becom es available
(a) The ladder program sets “1” to the REQ signal.
(b) When the REQ signal gets activated, the COM signal becomes active and the
message is sent.
(c) And when the message transmission is completed, the COM signal
becomes inactive.
(d) When the response is received, its RES_CODE is set and then the RES
signal becomes active.
(e) When the RES signal becomes active, the ladder should read out
RES_CODE and then sets “0” to REQ.
(f) When the REQ signal is reset, RES_CODE is reset.
(g) And the RES signal also becomes inactive.