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Modbus TCP signal syntax table

Table: Valid field values for Modbus TCP signals

Field

Valid values

Required for import

controller_node_name

16 characters or fewer. The string must contain at least one alphabetical character and can include letters, numbers and the following characters: $, -, and _

Yes

physical_device_node_name

The physical device name

Yes

logical_device_node_name

The logical device name

Yes

signal_name

The name of the signal as displayed in DeltaV Explorer as shown under the logical device.

Yes

protocol

Modbus TCP

Yes

description

As many as 255 characters using any keyboard characters

No

signal_tag

The device signal tag

No

data_direction

Input or output

No

data_type

  • ETHERNETIO_SIGNAL_BOOLEAN
  • ETHERNETIO_SIGNAL_INT8
  • ETHERNETIO_SIGNAL_UINT8
  • ETHERNETIO_SIGNAL_INT16
  • ETHERNETIO_SIGNAL_UINT16
  • ETHERNETIO_SIGNAL_INT32
  • ETHERNETIO_SIGNAL_UINT32
  • ETHERNETIO_SIGNAL_FLOAT

No

first_bit_used

The first bit for the DeltaV system to read from or write to for this signal

No

number_of_bits_used

The number of bits that the DeltaV system reads from or writes to for this signal

No

zero_scale

The low scale value

No

hundred_scale

The high scale value

No