Black Box IC109A-R2 Specifications download pdf (Page 32)

3 – Universal Modbus Controller Configuration and Addressing

Location Syntax for Non-named Addresses

Addresses without names can be addressed directly using the format:

n:0xA [Format]

Table Types

Figure 10 Digital Output Control Strategy - Example 2

Calculated Value

Digital Output

Digital Variable

"Forced Value"

Digital Variable

"Force Enabled"

Digital Switch

Part Description

n Table number. See “Table Types” on page 32 for table

descriptions and their number.

A Address within the table.

Format (Optional) Only used for Input and Holding register

tables (3 and 4). If a format is not specified, the format

defaults to IEEEFP. See “Data Formats” on page 33 for

more information.

Table Description Table Number Point Type Address Type

Digital Output (also

known as Coil)

0 Status Source/Destination

Digital Input 1 Status Source

Input Registers 3 Status/Analog/Accumulator Source

Holding Registers 4 Status/Analog/Accumulator Source/Destination

1. See “UMC800 Problems” on page 41 and “HC900 Problems” on page 43.

2. See “Digital Output Control Strategies” on page 31.

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Black Box IC109A-R2 Specifications Page 32