Mitsubishi Electric MELSEC iQ-R Series - Page 708

706
APPX
Appendix 5 List of Special Register Areas
*1 There are restrictions on the firmware version of the CPU module and software version of the engineering tool. ( Page 747 Added
and Enhanced Functions)
*2 Page 731 Waiting time for cyclic data receive after system switching (Twcyc)
SD1760 Extension cable
connection status
*1
Extension cable
connection status (bit
pattern)
Off: Not connected/
extension cable
error/connected
improperly
On: Connected properly
• In a redundant configuration of extension cables, the connection
status between each redundant extension base unit (OUT1/
OUT2) in the 1st to 6th extension levels and each next lower
level are stored using the following bit pattern.
b1 to b6: 1st to 6th extension base units (OUT1)
b9 to b14: 1st to 6th extension base units (OUT2)
b0, b7, b8, b15: Not used
• In a redundant configuration of extension cables, the status is
stored in the CPU module of the control system.
• If an extension base unit cannot communicate with the CPU
module due to an extension cable failure, the bits corresponding
to the extension base unit and ones in the lower levels will turn
off.
• When the systems are switched, the CPU module of the new
control system turns off all bits.
• In the 2nd and later extension levels, if redundant extension base
units and other extension base units are used together, the bits
corresponding to extension base units in the lower levels than
the redundant extension base unit will turn off.
S (Initial/every
END/system
switching)
SD1761 Extension cable route
information
*1
Extension cable route
information (bit pattern)
Off: Inactive
On: Active
• In a redundant configuration of extension cables, the route status
(active/inactive) between each redundant extension base unit
(OUT1/OUT2) in the 1st to 6th extension levels and each next
lower level are stored using the following bit pattern.
b1 to b6: 1st to 6th extension base units (OUT1)
b9 to b14: 1st to 6th extension base units (OUT2)
b0, b7, b8, b15: Not used
• In a redundant configuration of extension cables, the status is
stored in the CPU module of the control system.
• When a bit of SD1760 is off, the corresponding bit of SD1761 is
also off.
• When the systems are switched, the CPU module of the new
control system turns off all bits.
S (Initial/every
END/system
switching)
No. Name Data stored Details Set by (setting
timing)
b15 b8 b7 b0
b15 b8 b7 b0