Safety Relay User Manual Owner's manual
96 Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 14 Modbus Communication
Figure 113 - (Non-)Readable Pass-through Blocks
000377…000392 Ready-to-start of SOF 00…15
000393…000416 Fault bit 0 of SMF 0…23
00: No error
01: Crossloop
10: Simultaneity fault
11: One channel open after reset
000417…000440 Fault bit 1 of SMF 1…24
000441…000464 Fault bit 2 of SMF 1…24
000465…000488 Fault bit 3 of SMF 1…24
000489…000504 Retrigger Fault SOF 1…16
000505…000512 Cross Fault of Terminals 12…17
000513…000848 Reserved
000849…000860 Fault log
(1) When a Logic Level A block is automatically created as a Pass Through, the block does not
occupy memory and cannot be read over Modbus. This can be viewed in the CCW as a block
with no title. Pass Through blocks in Logic Level B can be read over Modbus.
Modbus Address Parameter