App - 51
APPENDICES
(2) System information
Table App. 2.3. Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM202 LED OFF command
OFF ON : LED OFF
• When this relay goes from OFF to ON, the LEDs
corresponding to the individual bits at SD202 go off
UNew QnA
SM203 STOP contact STOP status • Goes ON at STOP status S (Status change) M9042 QnA
SM204 PAUSE contact PAUSE status • Goes ON at PAUSE status S (Status change) M9041
QnA
SM205 STEP-RUN contact STEP-RUN status • Goes ON at STEP-RUN status S (Status change) M9054 QnA
SM206 PAUSE enable coil
OFF : PAUSE disabled
ON : PAUSE enabled
• PAUSE status is entered if this relay is ON when the
PAUSE contact goes ON
UM9040 QnA
SM210 Clock data set request
OFF : Ignored
ON : Set request
• When this relay goes from OFF to ON and after END
instruction execution of subsequent scan, clock data
stored in SD210 to SD213 are written to the CPU
module.
UM9025 QnA
SM211 Clock data error
OFF : No error
ON : Error
• ON when error is generated in clock data (SD210 to
SD213) value, and OFF if no error is detected.
S (Request) M9026 QnA
SM212 Clock data display
OFF : Ignored
ON : Display
• Displays clock data as month, day, hour, minute, and
second at the LED display at front of CPU
module.(Enabled only for Q3ACPU and Q4ACPU)
UM9027
Q3A
Q4A
Q4AR
SM213
Clock data read
request
OFF : Ignored
ON : Read request
• When this relay is ON, clock data is read to SD210 to
SD213 as BCD values.
UM9028 QnA
SM250 Max. loaded I/O read
OFF : Ignored
ON : Read
• When this relay goes from OFF to ON, maximum
loaded I/O number is read to SD250.
UNew QnA
SM251 I/O change flag
OFF : No replacement
ON : Replacement
• By turning this relay ON after setting the head I/O
number of the replaced I/O module to SD251, the I/O
module can be replaced online (with power on).
(Only one module can be replaced for each setting.)
• Turn this relay ON in the test mode of the program or
peripheral device for an I/O module change during
RUN, or in the test mode of the peripheral device for
an I/O change during STOP.
• Do not execute a RUN/STOP mode change until I/O
module change is finished.
UM9094
Q2A(S1)
Q3A
Q4A
Q4AR
SM252 I/O change OK
OFF : Replacement
prohibited
ON : Replacement enabled
• Goes ON when I/O replacement is OK. S (END) New
SM255
MELSECNET/10
module 1 information
OFF : Operative network
ON : Standby network
• Goes ON for standby network(If no designation has
been made concerning active or standby, active is
assumed.)
S (Initial) New
QnA
SM256
OFF : Reads
ON : Does not read
• For refresh from link to CPU module (B, W, etc.)
indicate whether to read from the link module.
UNew
SM257
OFF : Writes
ON : Does not write
• For refresh from CPU module to link (B, W, etc.),
designate whether to write to the link module.
UNew
SM260
MELSECNET/10
module 2 information
OFF : Operative network
ON : Standby network
• Goes ON for standby network
(If no designation has been made concerning active
or standby, active is assumed.)
S (Initial) New
QnA
SM261
OFF : Reads
ON : Does not read
• For refresh from link to CPU module (B, W, etc.)
indicate whether to read from the link module.
UNew
SM262
OFF : Writes
ON : Does not write
• For refresh from CPU module to link (B, W, etc.),
designate whether to write to the link module.
UNew
SM265
MELSECNET/10
module 3 information
OFF : Operative network
ON : Standby network
• Goes ON for standby network
(If no designation has been made concerning active
or standby, active is assumed.)
S (Initial) New
QnA
SM266
OFF : Reads
ON : Does not read
• For refresh from link to CPU module (B, W, etc.)
indicate whether to read from the link module.
UNew
SM267
OFF : Writes
ON : Does not write
• For refresh from CPU module to link (B, W, etc.),
designate whether to write to the link module.
UNew
SM270
MELSECNET/10
module 4 information
OFF : Operative network
ON : Standby network
• Goes ON for standby network
(If no designation has been made concerning active
or standby, active is assumed.)
S (Initial) New
QnA
SM271
OFF : Reads
ON : Does not read
• For refresh from link to CPU module (B, W, etc.)
indicate whether to read from the link module.
UNew
SM272
OFF : Writes
ON : Does not write
• For refresh from CPU module to link (B, W, etc.),
designate whether to write to the link module.
UNew
SM280 CC-Link error
OFF : Normal
ON : Error
• Goes ON when a CC-Link error is detected in any of
the installed CC-Link module. Remains ON if the
condition is restored to normal thereafter.
S (Error) New QnA