IDEC FC6A-C16K1CE Communications Manual page 164

7: 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 WindLDR or until the CPU is turned off. The cause of the data link
communication error can be checked using
See "Data Link Communication Error Code" on page 7-4.
When performing communication on port 2 or port 3, this function is disabled.
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 WindLDR.
When M8006 is on at the master station, M8007 is turned on at slave stations in the data link system.
M8007Data 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 communication
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
M8080
M8081
M8082
M8083
M8084
M8085
M8086
M8087
M8090
M8091
—
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.
7-6
Online
Slave Station Special Internal
Number Relay
Slave Station 1 M8092
Slave Station 2 M8093
Slave Station 3 M8094
Slave Station 4 M8095
Slave Station 5 M8096
Slave Station 6 M8097
Slave Station 7 M8100
Slave Station 8 M8101
Slave Station 9 M8102
Slave Station 10 M8103
—
FC6A S M S A
ERIES ICRO MART
> > , followed by
Monitor Monitor
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
— —
- -O T C
LL IN NE YPE OMMUNICATION
> >
Online Status Error Status: Details
Special Internal
Relay
M8104
M8105
M8106
M8107
M8110
M8111
M8112
M8113
M8114
M8115
M8116
M FC9Y-B1730
ANUAL
.
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