Mitsubishi Electric Melsec-QS Series Safety Application Manual page 34

4
PRECAUTIONS FOR USE OF SAFETY PLC
(3) Error detection of CC-Link Safety
Name
Safety station refresh
communication status
(1st safety master module)
Safety station refresh
communication status
(2nd safety master module)
4
4.2 Precautions for Programming
- 7
Errors concerning CC-Link Safety can be detected by safety station refresh
communication status which is described in Table4.3.
Create a proper sequence program using the information for error detection (SD)
which turns safety outputs OFF.
(a) Safety station refresh communication status
Names and numbers of the special registers for confirming the safety station
refresh communication status are shown in Table4.3.
Table4.3 Register names and compatible numbers
Definition for bits of special register (safety station refresh
Definition of each bit indicated as station No. in the table
No.
0: Normal, reserved station select, not connected, or standard remote
station
1: Safety station communication error
SD1004 to
SD1007
SD1204 to
SD1207
For details, refer to the following manual.
QSCPU User's Manual (Function Explanation, Program Fundamentals)
(b) Program example
The program for handling the error detection of CC-Link Safety is shown in
Figure4.6.
Figure4.6 shows the program used when outputting from the safety remote I/O
station of station No.1 connected to the first module of the safety master module
using SD1004.0.
SD1004.0
Safety station refresh
communication status
Figure4.6 Program for handling error detection of CC-Link Safety
communication status)
b15 b14
SD1004 16 15
SD1005 32 31
SD1006 48 47
SD1007 64 63
1 to 64 in the table indicate the station numbers.
b15 b14
SD1204 16 15
SD1205 32 31
SD1206 48 47
SD1207 64 63
1 to 64 in the table indicate the station numbers.
Other safety
status
–
b1 b0
to 2 1
to 18 17
to 34 33
to 50 49
–
b1 b0
to 2 1
to 18 17
to 34 33
to 50 49
Output