Special Internal Relays For Data Link Communication - IDEC FC4A-C10R2 User Manual

25: D L C
ATA INK OMMUNICATION

Special Internal Relays for Data Link Communication

Special internal relays M8005 through M8007 and M8080 through M8117 are assigned for the data link communication.
M8005 Data Link Communication Error
When an error occurs during communication in the data link system, M8005 turns on. The M8005 status is maintained
when the error is cleared and remains on until M8005 is reset using
the data link communication error can be checked using Online > Monitor, followed by Online > PLC Status > Error
Status: Details. See page 25-4.
M8006 Data Link Communication Prohibit Flag (Master Station)
When M8006 at the master station is turned on in the data link system, data link communication is stopped. When M8006
is turned off, data link communication resumes. The M8006 status is maintained when the CPU is turned off and remains
on until M8006 is reset using
When M8006 is on at the master station, M8007 is turned on at slave stations in the data link system.
M8007 Data Link Communication Initialize Flag (Master Station)
Data Link Communication Stop Flag (Slave Station)
M8007 has a different function at the master or slave station of the data link communication system.
Master station: Data link communication initialize flag
When M8007 at the master station is turned on during operation, the link configuration is checked to initialize the data link
system. When a slave station is powered up after the master station, turn M8007 on to initialize the data link system. After
a data link system setup is changed, M8007 must also be turned on to ensure correct communication.
Slave station: Data link communication stop flag
When a slave station does not receive communication data from the master station for 10 seconds or more in the data link
system, M8007 turns on. When a slave station does not receive data in 10 seconds after initializing the data link system,
M8007 also turns on at the slave station. When the slave station receives correct communication data, M8007 turns off.
M8080-M8116 Slave Station Communication Completion Relay (Master Station)
Special internal relays M8080 through M8116 are used to indicate the completion of data refresh. When data link commu-
nication with a slave station is complete, a special internal relay assigned for the slave station is turned on for one scan
time at the master station.
Special Internal
Relay
Slave Station 1
M8080
M8081 Slave Station 2
M8082 Slave Station 3
Slave Station 4
M8083
M8084 Slave Station 5
Slave Station 6
M8085
M8086 Slave Station 7
Slave Station 8
M8087
Slave Station 9
M8090
M8091 Slave Station 10
—
M8080 Communication Completion Relay (Slave Station)
When data link communication with a master station is complete, special internal relay M8080 at the slave station is
turned on for one scan time.
M8117 All Slave Station Communication Completion Relay
When data link communication with all slave stations is complete, special internal relay M8117 at the master station is
turned on for one scan time. M8117 at slave stations does not go on.
25-6
WindLDR .
Slave Station
Special Internal
Relay
Number
M8092
M8093
M8094
M8095
M8096
M8097
M8100
M8101
M8102
M8103
—
« FC4A M
WindLDR
Slave Station
Number
Slave Station 11
Slave Station 12
Slave Station 13
Slave Station 14
Slave Station 15
Slave Station 16
Slave Station 17
Slave Station 18
Slave Station 19
Slave Station 20
—
—
S U ' M
ICRO MART SER S ANUAL
or until the CPU is turned off. The cause of
Special Internal
Relay
M8104
M8105
M8106
M8107
M8110
M8111
M8112
M8113
M8114
M8115
M8116
»
Slave Station
Number
Slave Station 21
Slave Station 22
Slave Station 23
Slave Station 24
Slave Station 25
Slave Station 26
Slave Station 27
Slave Station 28
Slave Station 29
Slave Station 30
Slave Station 31