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SignalFire Telemetry
Rev 1.7
Modbus Program Steps Configuration
The register set to poll on each check-in must be defined using program steps. A program step consists of
one of the following Modbus opcodes:
0x01: Read discrete output (limit: 1 coil)
0x02: Read discrete input (limit: 1 coil)
0x03: Read holding register
0x04: Read input register
0x05: Write discrete output
Up to 34 program steps can be programmed. Any response
from a Modbus device (data or exception) will be forwarded
to the Modbus Gateway and cached. Click
Read Current
Program Steps from Device
to view the current program
steps in the table. They can then be deleted or re-ordered
using the buttons to the right of the table. To add a new
program step, fill in the 4 boxes at the bottom, and click
Add
New Program Step
. If the step is valid, it will be added to the
table. Finally, click
Write New Program Steps to Device
to
save the changes.
The Slave ID should match the ID of the connected Modbus
device. Make sure that there are no duplicate slave IDs in a
given network; the gateway will only cache one set of data for
each Slave ID, so the duplicate will be overwritten.
Note:
The register address entered is subtracted by the
Address Offset field to the right of the table. Typically, the
offset is 1. For example, a holding register of address 3990
should be entered as function code 0x03, address 3991. Keep
in mind that one floating point register should be read as two
16-bit registers.
Содержание Sentinel-485 Series
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