5.1.1. Standard commands

5.1.1.1. Read File Record (20)
5.1.1.2. Write File Record (21)
5.1.1.3. Read Device Identification (43/14)

The Standard commands in the Command Type drop-down list provide a low-level interface for sending Modbus commands to a slave.

These standard command pages make no use of any register definitions you may have entered, nor do they use or affect the register display area. All transferred values are displayed in the page itself.

The following fields are common to several of the pages:

For most commands, the other fields that need to entered should be obvious if you read the appropriate description in the current Modbus specification. The following sections describe the few cases that may not be obvious.

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