CHAPTER 2: MODBUS COMMUNICATION MEMORY MAP
UR FAMILY – COMMUNICATIONS GUIDE 2-149
2
" A28E Selector 1 Bit Mode 0 to 1 --- 1 F083 0 (Time-out)
" A28F Selector 1 Bit Acknowledge 0 to 4294967295 --- 1 F300 0
" A291 Selector 1 Power Up Mode 0 to 2 --- 1 F084 0 (Restore)
" A292 Selector 1 Target 0 to 2 --- 1 F109 0 (Self-reset)
" A293 Selector 1 Events 0 to 1 --- 1 F102 0 (Disabled)
" A294 Reserved (10 items) --- --- 1 F001 0
" A29E ...Repeated for Selector 2
Expanded B90 Direct Input/Output Status (Read Only)
B90 A300 Direct Device States, one per register (16 
items)
0 to 1 --- 1 F155 0 (Offline)
" A310 Direct Input States, one per register (256 
items)
0 to 1 --- 1 F108 0 (Off)
Digital Counter (Read/Write Setting) (8 Modules)
All except B90 A300 Digital Counter 1 Function 0 to 1 --- 1 F102 0 (Disabled)
" A301 Digital Counter 1 Name --- --- --- F205 “Counter 1"
" A307 Digital Counter 1 Units --- --- --- F206 (none)
" A30A Digital Counter 1 Block 0 to 4294967295 --- 1 F300 0
" A30C Digital Counter 1 Up 0 to 4294967295 --- 1 F300 0
" A30E Digital Counter 1 Down 0 to 4294967295 --- 1 F300 0
" A311 Digital Counter 1 Preset –2147483647 to 
2147483647
--- 1 F004 0
" A313 Digital Counter 1 Compare –2147483647 to 
2147483647
--- 1 F004 0
" A315 Digital Counter 1 Reset 0 to 4294967295 --- 1 F300 0
" A317 Digital Counter 1 Freeze/Reset 0 to 4294967295 --- 1 F300 0
" A319 Digital Counter 1 Freeze/Count 0 to 4294967295 --- 1 F300 0
" A31B Digital Counter 1 Set To Preset 0 to 4294967295 --- 1 F300 0
" A31D Reserved (11 items) --- --- --- F001 0
" A328 ...Repeated for Digital Counter 2
" A350 ...Repeated for Digital Counter 3
" A378 ...Repeated for Digital Counter 4
" A3A0 ...Repeated for Digital Counter 5
" A3C8 ...Repeated for Digital Counter 6
" A3F0 ...Repeated for Digital Counter 7
" A418 ...Repeated for Digital Counter 8
PID Regulator (Read/Write Setting) (4 Modules)
C30, F35 A500 PID 1 Function 0 to 1 --- 1 F102 0 (Disabled)
" A501 PID 1 Sample Time 0.05 to 30 sec 0.01 F001 5
" A502 PID 1 Process Signal 0 to 65535 --- 1 F600 0
" A503 PID 1 Setpoint Signal -99999.99 to 
99999.99
--- 0.01 F004 0
" A505 PID 1 Tracking Signal 0 to 65535 --- 1 F600 0
" A506 PID 1 Proportional Gain 0.01 to 100 --- 0.01 F001 100
" A507 PID 1 Setpoint Weighting 0.01 to 1 --- 0.01 F001 100
" A508 PID 1 Integ Time Const 0 to 600 sec 0.01 F001 100
" A509 PID 1 Antiwindup 0 to 1 --- 1 F102 0 (Disabled)
" A50A PID 1 AW Time Const 0 to 600 sec 0.01 F001 100
" A50B PID 1 Deriv Time Const 0 to 600 sec 0.01 F001 100
Products Address Register name Range Units Step Format Default