ICP DAS USA M-7026, User Manual

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M-7026
M-7026 User Manual Rev: 1.5 Date: 2016/03/10
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2.33 $AAP
Description:
This command is used to read which communication protocol is supported and
currently being used by a specified module.
Syntax:
$AAP[CHKSUM](CR)
$
Delimiter character
AA The address of the module to be read in hexadecimal format (00 to
FF)
P The command to read the communication protocol
Response:
Valid Command: !AASC[CHKSUM](CR)
Invalid Command: ?AA[CHKSUM](CR)
! Delimiter character to indicate a valid command
? Delimiter character to indicate an invalid command
AA The address of the responding module in hexadecimal format (00 to
FF)
S Indicates which protocol is supported
0: Only the DCON protocol is supported
1: Both the DCON and Modbus RTU protocols are supported
C Indicates which protocol is currently being used
0: The protocol set in the EEPROM is DCON
1: The protocol set in the EEPROM is Modbus RTU
There will be no response if the command syntax is incorrect, there is a
communication error, or there is no module with the specified address.
Examples:
Command: $01P1 Response: !01
Sets the communication protocol for module 01 to Modbus RTU and
returns a response indicating that the command was successful.
Command: $01P Response: !0111
Reads which communication protocol is being used by module 01 and
returns a response indicating that the command was successful with a
value of 11, meaning that the module supports both the DCON and
Modbus RTU protocols, and that the protocol which will be used at the
next power-on reset is Modbus RTU.
Related Commands:
Section 2.34 $AAPN