CHAPTER 2: MODBUS COMMUNICATION MEMORY MAP
UR FAMILY – COMMUNICATIONS GUIDE 2-153
2
" A8A4 DCB3 Dir Fwd1 0 to 4294967295 --- 1 F300 0
" A8A6 DCB3 Dir Fwd2 0 to 4294967295 --- 1 F300 0
" A8A8 DCB3 Dir Fwd3 0 to 4294967295 --- 1 F300 0
" A8AA DCB3 Dir Rev1 0 to 4294967295 --- 1 F300 0
" A8AC DCB3 Dir Rev2 0 to 4294967295 --- 1 F300 0
" A8AE DCB3 Dir Rev3 0 to 4294967295 --- 1 F300 0
" A8B0 DCB3 Force Tx Stop1 0 to 4294967295 --- 1 F300 0
" A8B2 DCB3 Force Tx Stop2 0 to 4294967295 --- 1 F300 0
" A8B4 DCB3 Rx 0 to 4294967295 --- 1 F300 0
" A8B6 DCB3 Scheme Target 0 to 2 --- 1 F109 0 (Self-reset)
" A8B7 DCB3 Scheme Events 0 to 1 --- 1 F102 0 (Disabled)
Frequency Rate of Change (Read/Write Setting) (2 or 4 Modules)
D30, D60, F60, 
G30, G60, L30, 
L90, N60, T60
A900 Frequency Rate of Change 1 Function 0 to 1 --- 1 F102 0 (Disabled)
" A901 Frequency Rate of Change 1 OC 
Supervision
0.02 to 30 pu 0.001 F001 200
" A902 Frequency Rate of Change 1 Min 20 to 80 Hz 0.01 F001 4500
" A903 Frequency Rate of Change 1 Max 20 to 80 Hz 0.01 F001 6500
" A904 Frequency Rate of Change 1 Pickup Delay 0 to 65.535 s 0.001 F001 0
" A905 Frequency Rate of Change 1 Reset Delay 0 to 65.535 s 0.001 F001 0
" A906 Frequency Rate of Change 1 Block 0 to 4294967295 --- 1 F300 0
" A908 Frequency Rate of Change 1 Target 0 to 2 --- 1 F109 0 (Self-reset)
" A909 Frequency Rate of Change 1 Events 0 to 1 --- 1 F102 0 (Disabled)
" A90A Frequency Rate of Change 1 Source 0 to 5 --- 1 F167 0 (SRC 1)
" A90B Frequency Rate of Change 1 Trend 0 to 2 --- 1 F224 0 
(Increasing)
" A90C Frequency Rate of Change 1 Pickup 0.1 to 15 Hz/s 0.01 F001 50
" A90D Frequency Rate of Change 1 OV 
Supervision
0.1 to 3 pu 0.001 F001 700
" A90E Frequency Rate of Change 1 Reserved (3 
items)
0 to 1 --- 1 F001 0
" A911 ...Repeated for Frequency Rate of Change 2
D60, F60, G30, 
G60, L90, N60, 
T60
A922 ...Repeated for Frequency Rate of Change 3
" A933 ...Repeated for Frequency Rate of Change 4
Restricted Ground Fault (Read/Write Grouped Setting) (4 or 6 Modules)
F60, G30, G60, 
L90, T35, T60
A960 Restricted Ground Fault 1 Function 0 to 1 --- 1 F102 0 (Disabled)
" A961 Restricted Ground Fault 1 Source 0 to 5 --- 1 F167 0 (SRC 1)
" A962 Restricted Ground Fault 1 Pickup 0.005 to 30 pu 0.001 F001 80
" A963 Restricted Ground Fault 1 Slope 0 to 100 % 1 F001 40
" A964 Restricted Ground Fault 1 Delay 0 to 600 s 0.01 F001 0
" A965 Restricted Ground Fault 1 Reset Delay 0 to 600 s 0.01 F001 0
" A966 Restricted Ground Fault 1 Block 0 to 4294967295 --- 1 F300 0
" A968 Restricted Ground Fault 1 Target 0 to 2 --- 1 F109 0 (Self-reset)
" A969 Restricted Ground Fault 1 Events 0 to 1 --- 1 F102 0 (Disabled)
" A96A ...Repeated for Restricted Ground Fault 2
" A974 ...Repeated for Restricted Ground Fault 3
Products Address Register name Range Units Step Format Default