APPENDICES
Appendix 1 Special Relay List
App - 16
9
Parameters
10
Device Explanation
11
CPU Module Processing
Time
12
Procedure for Writing
Program to CPU ModuleAppendicesIndex
(9) Latch area
TableApp.9 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM820 Step trace preparation
OFF : Not ready
ON : Ready
• Goes ON after program trace registration, at ready S (Status change) New
QnA
SM821 Step trace starts
OFF : Suspend
ON : Start
• Select whether execution of step trace is started or
suspended.
• When this goes ON, step trace is started
• Suspended when OFF (Related special M all OFF)
U
M9182form
at change
SM822
Step trace execution
underway
OFF : Suspend
ON : Start
• Goes ON when step trace execution is underway
• Goes OFF at completion or suspension
S (Status change) M9181
SM823 After step trace trigger
OFF : Not after trigger
ON : Is after first trigger
• Goes ON if even 1 block within the step trace being
executed is triggered.
• Goes OFF when step trace is commenced.
S (Status change) New
SM824 After Step trace trigger
OFF : Is not after all triggers
ON : Is after all triggers
• Goes ON if all blocks within the step trace being
executed are triggered.
• Goes OFF when step trace is commenced.
S (Status change) New
SM825 Step trace completed
OFF : Not completed
ON : End
• Goes ON at step trace completion.
• Goes OFF when step trace is commenced.
S (Status change) M9180
SM826
Trace error
OFF : Normal
ON : Errors
• Switches ON if error occurs during execution of trace S (Status change) New
Qn(H)
QnPH
QnPRH
QnU
Sampling trace error
• Goes ON if error occurs during execution of sampling
trace.
S (Status change) New
QnA
SM827 Status latch error
OFF : Normal
ON : Errors
• Goes ON if error occurs during execution of status
latch.
S (Status change) New
SM828 Program trace error
OFF : Normal
ON : Errors
• Goes ON if error occurs during execution of program
trace.
S (Status change) New
SM829
Forced registration
specification of trace
setting
ON : Forced registration
enabled
OFF : Forced registration
disabled
• Even when the trigger condition is established, the
sampling trace setting can be set to the QnUCPU by
turning SM829 ON and registering the sampling
trace setting by GX Developer.
UNew QnU
TableApp.10 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM900 Power off file
OFF : No power off file
ON : Power off file present
• Goes ON if a file is present during access when
power is interrupted.
S (Status
change)/U
New
QnA
SM910 RKEY registration flag
OFF : Keyboard input
notregistered
ON : Keyboard input
registered
• Goes ON at registration of keyboard input.
• OFF if keyboard input is not registered.
S (Instruction
execution)
New