Commands
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If the control interface detects a new command, it sets the status in the input field to FFh. The
reply counter value increases by 1. The status is displayed (see chapter 7.17) after the control
interface has executed the commands.
The toggle bit of the response is the same as the toggle bit of the command.
When new data becomes available, the previous data is overwritten. The reply counter value
increases by 1. In the event of an overflow, the reply counter is reset to its start value (01h).
New commands may only be sent to an output field after the response from the previous
command is read.
For an overview of supported commands, see chapter 7.10.
Command:
Confirmation (with MODBUS/TCP, no confirmation is sent)
Response:
Byte 0*
Telegram length, high byte
Byte 1*
Telegram length, low byte
Byte 2
Command code
Byte 3
Channel/toggle bit = 0
Byte 4
Parameters
Byte 5
Parameters
Byte 6
Data to be written
...
...
Byte N
Data to be written
Table 7.1
* This byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
Byte 0*
Telegram length, high byte
Byte 1*
Telegram length, low byte
Byte 2
Command code (echo)
Byte 3
Channel/toggle bit (echo) = 0
Byte 4
Status FFh
Byte 5
Reply counter
...
00h
Byte N
00h
Table 7.2
* This byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
Byte 0*
Telegram length, high byte
Byte 1*
Telegram length, low byte
Byte 2
Command code (echo)
Byte 3
Channel/toggle bit (echo) = 0
Byte 4
Status
Byte 5
Reply counter
Byte 6
Read data
...
...
Byte N
Read data
Table 7.3
* This byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
