Table of Contents
Advertisement
(i) Processing that sets the link devices saved at master switching and refresh
instruction at standby master switching
After saving the link devices, wait a fixed number of scans and execute the processing that sets the link
devices saved at master switching and Refresh instruction at standby master switching (SB0001).
Number of scans for waiting after saving the link devices differs depending on the mode setting. Use the
following values.
Mode setting
Remote net Ver.1 mode
Remote I/O net mode
Remote net Ver.2 mode
Remote net additional mode
(6) Link special relays/registers (SB and SW) relating to the standby master
function
The following shows the list of the link special relays and registers relating to the standby master function.
For details, refer to
Link special relay/register
Link special relay
Link special register
150
Number of scans for waiting
Fixed to 0
(Link scan time / Sequence scan time) (Rounded
up to the nearest integer) 4
Page 409, Appendix 3.
Number
SB0001
Refresh instruction at standby master switching
SB000C
Forced master switching
SB0042
Refresh instruction acknowledgement status at standby master switching
SB0043
Refresh instruction complete status at standby master switching
SB0046
Forced master switching executable status
SB005A
Master switching request acknowledgement
SB005B
Master switching request complete
SB005C
Forced master switching request acknowledgement
SB005D
Forced master switching request complete
SB0062
Host standby master station setting information
SB0070
Master station information
SB0071
Standby master station information
SB0079
Master station return specification information
SB007B
Host master/standby master operation status
SW0043
Refresh instruction at standby master switching result
SW005D
Forced master switching instruction result
SW0073
Standby master station number
Remark
• For link scan time, use the maximum value after
master switching.
• For sequence scan time, use the minimum value
after master switching.
Name
Advertisement
Table of Contents
Troubleshooting
