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Display instructions
Category
Instruction
Symbol
symbol
ASCII print
PR
When SM701 is OFF
PR
PR
When SM701 is ON
PR
PRC
PRC
Reset
LEDR
LEDR
Debugging and failure diagnosis instructions
Category
Instruction
Symbol
symbol
Checks
CHKST
CHKST
CHK
Check condition
CHKCIR
CHKCIR
CHKEND
CHKEND
Processing details
• Outputs ASCII code from
device designated by (S) to
S D
00H to output module.
• Outputs ASCII code of 8
points (16 characters) from
S D
device designated by (S) to
output module.
• Converts comments from
S D
device designated by (S) to
ASCII code and outputs to
output module.
• Resets an annunciator.
Processing details
• The CHK instruction is
executed when CHKST is
executable.
• Jumps to the step following
the CHK instruction when
CHKST is in a non-
executable status.
• During normal conditions
CHK
SM80: OFF, SD80: 0
• During abnormal conditions
SM80: ON, SD80:
Failure No.
• Starts update in the ladder
pattern being checked by
the CHK instruction.
• Ends update in the ladder
pattern being checked by
the CHK instruction.
Execution
Number
Subset Reference
condition
of basic
steps
3
1
Execution
Number
Subset Reference
condition
of basic
steps
1
1
2 INSTRUCTION TABLES
2.5 Application Instructions
2
Page 512
Page 515
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