485
APPENDICES
A
Appendix 2 List of Special Relay Areas
(12)Predefined protocol function
*1 Built-in Ethernet port LCPU whose serial number (first five digits) is "15102" or later
*2 Modules whose serial number (first five digits) is "15103" or later
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Corresponding
CPU
SM1332
Predefined
protocol ready
(for built-
in/adapter serial
communications)
OFF: Not ready
ON: Ready
The protocol setting file is checked when
the CPU module is powered on or reset, or
the check is requested. This relay turns on
when the file is normal.
S (Status
change)
New
LCPU
*1
SM1333
Predefined
protocol setting
check request
(for built-
in/adapter serial
communications)
OFF: Not requested
ON: Requested
The protocol setting file is checked when
this relay turns on.
The relay turns off when the check is
completed.
S (Status
change)/U
New
LCPU
*1
SM1334
RS-422/485 echo
back
specification (for
built-in/adapter
serial
communications)
OFF: Enabled
ON: Disabled
When the RS-422/485 adapter is used,
whether to receive an echo back of the
data that has been sent can be specified.
Echo back data are received when this
relay is off, and are not received
(discarded) when this relay is on.
UNew
LCPU
*1
SM1354
Predefined
protocol ready
(for built-in
Ethernet
communications)
OFF: Not ready
ON: Ready
The protocol setting file is checked when
the CPU module is powered on or reset, or
the check is requested. This relay turns on
when the file is normal.
S (Status
change)
New
QnUDV
*2
LCPU
*1
SM1355
Predefined
protocol setting
check request
(for built-in
Ethernet
communications)
OFF: Not requested
ON: Requested
The protocol setting file is checked when
this relay turns on.
The relay turns off when the check is
completed.
S (Status
change)/U
New
QnUDV
*2
LCPU
*1