Link Special Relay (Sb) - Mitsubishi MELSEC QS Series User Manual

9
DEVICE EXPLANATION

9.2.7 Link special relay (SB)

(1) Definition
Link special relay is a relay used to indicate the communication status and error
detection of the CC-Link Safety master module, CC-Link IE controller network
module, and MELSECNET/H module.
ON/OFF of the link special relays are controlled by various causes that occur during
data link.
By monitoring the link special relays, the communication status, error status and
others of data link can be grasped.
(2) Number of link special relay points
The number of link special relay points is as described in Table9.3.
Safety CPU
Remark
Table9.3 Number of link special relay points of each CPU module
CPU module
For details on the link special relay, refer to the following manuals.
CC-Link IE Controller Network Reference Manual
Q Corresponding MELSECNET/H Network System Reference Manual
(PLC to PLC network)
Number of link special relay points
1536 points (SB0 to 5FF).
The number of device points for link special relays is 512 in
the CC-Link Safety master module, CC-Link IE controller
network module, and MELSECNET/H module.
The link special relays can be assigned as shown below.
Link special relay
SB0
For 1st network module
SB1FF
SB200
For 2nd network module
SB3FF
SB400
For 3rd network module
SB5FF
9.2 Internal User Devices
9.2.7 Link special relay (SB)
9
10
11
512
points
512
1536
points
points
512
points
9
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