457
APPENDICES
A
Appendix 2 List of Special Relay Areas
SM90
Startup of
monitoring timer for
step transition
(Enabled only
when SFC
program exists)
OFF: Not started
(monitoring timer
reset)
ON: Started
(monitoring timer
started)
Corresponds to
SD90
• Goes ON when
measurement of
step transition
monitoring timer is
commenced.
• Resets step
transition monitoring
timer when it goes
OFF.
U
M9108
Qn(H)
QnPH
QnPRH
SM91
Corresponds to
SD91
M9109
SM92
Corresponds to
SD92
M9110
SM93
Corresponds to
SD93
M9111
SM94
Corresponds to
SD94
M9112
SM95
Corresponds to
SD95
M9113
SM96
Corresponds to
SD96
M9114
SM97
Corresponds to
SD97
New
SM98
Corresponds to
SD98
New
SM99
Corresponds to
SD99
New
SM100
Serial
communication
function using flag
OFF: Not to be used
ON: To be used
This relay stores whether the serial
communication function is set to be used
or not in PLC parameter.
S (Power-on
or reset)
New
Q00/Q01
QnU
*2
LCPU
*3
SM101
Communication
protocol status flag
OFF: Other than MC
protocol
communication
devices
ON: MC protocol
communication
device
This relay stores whether the
communication-target device is an MC
protocol communication device or not.
S (Being
communicat
ed via RS-
232 or RS-
422/485)
New
Q00/Q01
QnU
*2
LCPU
*3
SM110 Protocol error
OFF: Normal
ON: Error
• Turns on if a failed protocol was used
to make communication in the serial
communication function.
• This relay remains on even after the
protocol returns to normal.
S (Error) New
Q00/Q01
QnU
*2
LCPU
*3
SM111
Communication
status
OFF: Normal
ON: Error
• Turns on if the mode used to make
communication was different from the
mode set in the serial communication
function.
• This relay remains on even after the
system returns to normal.
S (Error) New
Q00/Q01
QnU
*2
LCPU
*3
SM112
Error information
clear
ON: Cleared
This relay is turned on to clear error
codes stored in SM110, SM111, SD110,
and SD111. The error codes are cleared
when this relay is turned on.
UNew
Q00/Q01
QnU
*2
LCPU
*3
SM113 Overrun error
OFF: Normal
ON: Error
This relay turns on if an overrun error
occurs in communication using the serial
communication function.
S (Error) New
Q00/Q01
QnU
*2
LCPU
*3
SM114 Parity error
OFF: Normal
ON: Error
This relay turns on if a parity error occurs
in communication using the serial
communication function.
S (Error) New
Q00/Q01
QnU
*2
LCPU
*3
SM115 Framing error
OFF: Normal
ON: Error
This relay turns on if a flaming error
occurs in communication using the serial
communication function.
S (Error) New
Q00/Q01
QnU
*2
LCPU
*3
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Corresponding
CPU