Automationdirect.com HX-ECOM Series - Example 1: V2100; Example 2: Y20; Example 3: C54

Ethernet Communications Modules, 3rd Edition, Rev. D
5-14
Chapter 5: MODBUS TCP for H0/H2/H4-ECOM100
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The following examples show how to generate the Modbus address and data type for hosts
which require this format.
Example 1: V2100
Find the Modbus address for User V location V2100.
1. Find V-memory in the table.
2. Convert V2100 into decimal (1088).
3. Add the Modbus starting address for the mode (40001).
Example 2: Y20
Find the Modbus address for output Y20.
1. Find Y outputs in the table.
2. Convert Y20 into decimal (16).
3. Add the starting address for the range (2048).
4. Add the Modbus address for the mode (1).
Example 3: C54
Find the Modbus address for Control Relay
C54.
1. Find Control Relays in the table.
2. Convert C54 into decimal (44).
3. Add the starting address for the range (3072).
4. Add the Modbus address for the mode (1).
PLC Addr. (Dec.) + Mode Address
V2100 = 1088 decimal
1088 + 40001 =
PLC Addr.(Dec.) + Start Address + Mode
C54 = 44 decimal
44 + 3072 + 1 =
41089
3117
Outputs (Y)
320 Y0 – Y477 2048 – 2367 1 1
Coil
Control Relays (CR)
256 C0 –C377 3072 – 3551 1 1 Coil
Timer Contacts (T)
128 T0 –T177 6144 – 6271 1 1
Coil
Outputs (Y)
320 Y0 – Y477 2048 – 2367 1 1
Coil
Control Relays (CR)
256 C0 –C377 3072 – 3551 1 1 Coil
Timer Contacts (T)
128 T0 –T177 6144 – 6271 1 1
Coil
PLC Addr.(Dec.) + Start Address + Mode
Y20 = 16 decimal
16 + 2048 + 1 =
2065
For Word Data Types ... PLC Address Dec. + Appropriate Mode Address
Timer Current Values (V)
128 V0 – V177 0 – 127 3001 30001 Input Reg.
Counter Current Values (V)
128 V1000 – V1177 512 – 639 3001 30001 Input Reg.
V-Memory, user data (V)
1024 V2000 – V3777 1024 – 2047 4001 40001
Holding Reg.