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21 DEVICES
21.2 User Devices
Internal relay (M)
Device intended to be used as an auxiliary relay inside the CPU module. All internal relays are turned OFF by the following
operation.
• CPU module power OFFON
• Reset
• Latch clear
Latch relay (L)
Auxiliary relay that can latch (backup by battery) in the CPU module. Computation results (ON/OFF information) are latched
even when performing the following operations.
• CPU module power OFFON
• Reset
Link relay (B)
Device intended to be used as a CPU side device when refreshing bit data between CPU module and network module.
Refreshing network module that uses link relay (B)
Sends/receives data mutually between network module link relays (LB) and link relay (B) in the CPU module. Set refresh
range by parameters of the network module. Link relays not used for refresh can be used for other purposes.
Annunciator (F)
Internal relay used for program for detecting equipment errors/faults created by the user. When the annunciator (F) is turned
ON, SM62 (Annunciator (F) Detection) turns ON, and the number of annunciator devices that are ON and their numbers are
stored from SD62 (Annunciator (F) Detection No.) to SD79 (Annunciator (F) Detection No. Table).
SD62
BCDP
SM62
SET
F5
K4Y20
X0
X10
SM62
SD62
SD63
SD64
SD65
SD79
0
0
Fault detection program
Annunciator ON detection
OFFON
05
01
05
Outputs No. of
the annunciator
that turned ON