ABB PRO-33.0-TL Series, Service Manual

Page: 106 / 122

106 Fieldbus interfaces
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Mode 6 - supports both individual 16- and 32-bit parameter read/write operations.
Note that only parameter groups up to 199 can be accessed using addressing
mode 6.
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Modbus function codes
The following table describes supported Modbus function codes.
Addressing mode
Mode 1 This mode can access the 16-bit value of any parameter in the inverter. (16-bit
values, groups 1...255, indexes 1...255) RegisterAddress = 256*Para
ParamIndex - 1
Mode 6 This mode can access both 16-bit and 32-bit values of parameters. (16-bit values,
groups 101...199, indexes 1...99) RegisterAddress = 100*(ParamGroup – 100) +
ParamIndex - 1 (32-bit values, groups 101...199, indexes 1...99) RegisterAd-
dress = 20000 + 200*(ParamGroup – 100) + 2*ParamIndex – 1
Mode 7 (32-bit values, groups 101...227, indexes 1...255) RegisterAddress =
512*(ParamGroup – 100) + 2*ParamIndex - 1
Function Code (hex) Supported subcodes
Read Coil Status 0x01 N/A
Read Discrete Input
Status 0x02 N/A
Write Single Holding
Register 0x06 N/A
Read Multiple Holding
Registers 0x03 N/A
Force Single Coil 0x05 N/A
Diagnostics 0x08 • 0x00 – Query – echo/loopback testing
• 0x01 – Restart – restart and initialize the EFB. This is the
only command that brings the device out of the listen-only
mode.
• 0x04 – Force Listen Only
• 0x0A – Clear Counters
• 0x0B – Read Bus Message Count
• 0x0C – Read Bus CRC Error Count
• 0x0D – Read Bus Exception Count
• 0x0E – Read Slave Message Count
• 0x0F – Read Slave No Response Count
• 0x10 – Read Slave NACK Count
• 0x11 – Read Slave Busy Count
• 0x12 – Read Bus Overrun Count
• 0x14 – Clear Overrun Counter
Get Comm. Event
Counter 0x0B N/A
Force Multiple Coils 0x0F N/A
Write Multiple Holding
Registers 0x10 N/A
Mask Write Register 0x16 N/A