Changing Check Format Of Chk - Mitsubishi Electric MELSEC-Q/L Programming Manual

Changing check format of CHK

CHKCIR, CHKEND
Basic
High
Process
performance
CHKST
CHK
CHKCIR
CHKEND
(1) Page 520 Special format failure check
Setting Internal device
data
Bit
 
Processing details
• The check ladder pattern that will be used in the CHK instruction can be updated to any format desired. The actual failure
checks are conducted with the CHKST and CHK instructions.
• Failure checks are conducted according to the check conditions designated by the CHK instruction and the ladder pattern
described between the CHKCIR and CHKEND instructions.
• Refer to Page 520 Special format failure check for more information on the CHKST and CHK instructions.
• To change the check format of the CHK instruction using the CHKCIR to CHKEND instructions, the user
should create a ladder with index modification (Z0).
7 APPLICATION INSTRUCTIONS
524
7.10 Debugging and Failure Diagnosis Instructions
LCPU
Universal
Redundant
Command
X
SM400
SM400
R, ZR
Word
X X
Ladder pattern to be checked
J\
Bit Word
CHKST
X
CHK
CHKCIR
Fn
Fn
Fn
CHKEND
U\G Zn Constant
(1)
Max. 9 coils
Others