62 Rockwell Automation Publication 5069-UM003A-EN-P - May 2018
Chapter 4 Configure Compact 5000 I/O Serial Module
Modbus Slave Address Table Limits
• Up to 30 data point ranges can be created, subject to available memory:
– 200 byte maximum of Holding registers (up to 100 INTs or 50
REALs)
– 200 byte maximum of Input registers (up to 100 INTs or 50 REALs)
– Up to 128 Coils (Data Indexes 0…15 at 8-bit boundaries)
– Up to 128 Discrete inputs (Data Indexes 0…15 at 8-bit boundaries)
Modbus Slave Data Mapping Example
• Local:1:O1.Slave.HoldingRegister[0…2] = 400003…400005
• Local:1:O1.Slave.HoldingRegister[3…9] = 432000…432006
• Local:1:O1.Slave.HoldingRegister[10…99] = 400999…410088
• Local:1:O1.Slave.Coils[0].0…0.7 = 000000…000007
• Local:1:O1.Slave.Coils[1].0 = 000010
• Local:1:O1.Slave.Coils[2].0…[4].0 = 0320000…032016
• Local:1:O1.Slave.Coils[5].0…[15].7 = 000999…001086
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