App-176
(10) Built-in Ethernet port QCPU and built-in Ethernet function
*1 This applies to the Built-in Ethernet port QCPU.
(11) Process control instruction
(12) Redundant system (host system CPU information
*1
)
The special relay (SM1510 to SM1599) is valid only for redundant systems. All bits are set to off for stand-alone
systems.
Number
Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM1270
Time setting
function (SNTP
client) execution
OFF : No time setting
function
(SNTP client)
execution
ON : Time setting
function
(SNTP client)
execution
This relay is turned on to perform the time
setting function (SNTP client). (Turns on only
when "Use" has been set for the time setting
function in the time setting parameter.)
UNew
QnU
*1
LCPU
SM1273
Remote
password
mismatch count
clear
OFF : Normal
ON : Clear
This relay is turned on to clear the
accumulated number of mismatched remote
password entries (SD979 to SD999).
Number
Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM1500
Hold mode
OFF : No-hold
ON : Hold
Specifies whether or not to hold the output
value when a range over occurs for the S.IN
instruction range check.
UNew
QnPH
QnPRH
SM1501
Specifies whether or not the output value is
held when a range over occurs for the S.OUT
instruction range check.
Number
Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM1510 Operation mode
OFF : Redundant
system backup
mode,
stand-alone
system
ON : Redundant
system separate
mode
This relay is on while the system is
operating in the separate mode.
S (Every END
processing)
New QnPRH
SM1511
System A
identification flag
• Distinguishes between system A and system B.
• The flag status does not change even if the tracking cable is
disconnected.
S (Initial)
SM1512
System B
identification flag
SM1513
Debug mode
status flag
OFF : Not in debug
mode
ON : Debug mode
This relay is on while the system is
operating in the debug mode.
SM1511
SM1512
ON
OFF
System A
OFF
System B
ON
OFF
OFF
If TRK. CABLE ERR.
(error code: 6210) occurred (Unknown)
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