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Ethernet Communications Modules, 3rd Edition, Rev. D
5-7
Chapter 5: MODBUS TCP for H0/H2/H4-ECOM100
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A
B
C
D
DL06 Memory Type
Qty
(Dec.)
PLC Range
(Octal)
Modbus
Address Range
Modbus
Data Type
For Discrete Data Types... Convert PLC Addr. to Dec. + Start of Range
+ Data Type
Inputs (X)
512 X0 – X777 2048 – 2559
Input
Special Relays (SP)
512 SP0 – SP777 3072 – 3583 Input
Outputs (Y)
512 Y0 – Y777 2048 – 2559 Coil
Control Relays (C)
1024 C0 –C1777 3072 – 4095 Coil
Timer Contacts (T)
256 T0 – T377 6144 – 6399 Coil
Counter Contacts (CT)
128 CT0 – CT177 6400 – 6527 Coil
Stage Status Bits (S)
1024 S0 – S1777 5120 – 6143 Coil
Global Inputs (GX)
2048 GX0 – GX3777 0 – 2047 Input
Global Outputs (GY)
2048 GY0 – GY3777 0 – 2047 Coil
For Word Data Types ... Convert PLC Addr. to Dec. + Data Type
Timer Current Values (V)
128 V0 – V177 0 – 127
Input Register
Counter Current Values (V)
128 V1000 – V1177 512 – 639 Input Register
V-Memory, user data (V)
256
3072
4096
V400 – V677
V1400 – V7377
V10000 – V17777
256 – 511
768 – 3839
4096 – 8191
Holding Register
D2-240 Memory Type
Qty
(Dec.)
PLC Range
(Octal)
Modbus
Address Range
Modbus
Data Type
For Discrete Data Types... Convert PLC Addr. to Dec. + Start of Range
+ Data Type
Inputs (X)
320 X0 – X477 2048 – 2559
Input
Special Relays (SP)
144
SP0 – SP137
SP540 – SP617
3072 – 3167
3280 – 3471
Input
Outputs (Y)
320 Y0 – Y477 2048 – 2367 Coil
Control Relays (C)
256 C0 –C377 3072 – 3551 Coil
Timer Contacts (T)
128 T0 – T177 6144 – 6271 Coil
Counter Contacts (CT)
128 CT0 – CT177 6400 – 6527 Coil
Stage Status Bits (S)
512 S0 – S777 5120 – 5631 Coil
For Word Data Types ... Convert PLC Addr. to Dec. + Data Type
Timer Current Values (V)
128 V0 – V177 0 – 127
Input Register
Counter Current Values (V)
128 V1000 – V1177 512 – 639 Input Register
V-Memory, user data (V)
1024 V2000 – V3777 1024 – 2047 Holding Register
V-Memory, user data (V)
non-volatile
256 V4000 – V4377 2048 – 2303 Holding Register
V-Memory, system (V)
106 V7620 – V7737
V7746 – V7777
V3984 – V4063
V4070 – V4095
Holding Register