Modbus Functions; Functions Supported; Exception Responses - Astralpool 65321 Manual Del Usuario

6. MODBUS FUNCTIONS

6.1. FUNCTIONS SUPPORTED

Please, be careful at the possible actuations, and make sure that the function used is the correct.
Functions are implemented
http://www.MODBUS.org/docs/MODBUS_Application_Protocol_V1_1b.pdf. In general registers are
unsigned 16 bit coded.
0x01 READ COILS
0x02 READ DISCRETE INPUTS
0x03 READ HOLDING REGISTERS
0x04 READ INPUT REGISTERS
0x05 WRITE SINGLE COIL
0x06 WRITE SINGLE REGISTER

6.2. EXCEPTION RESPONSES

Exception responses are implemented according to the MODBUS-RTU standard described in the
chapter MODBUS exception responses:
http://www.MODBUS.org/docs/MODBUS_Application_Protocol_V1_1b.pdf
The exceptions implemented are from 1 to 4 I 6.
Exceptions of type 4 are used to indicate that you are trying to use or activate a heater function that
cannot be used in the current configuration.
Exceptions of type 6 are used to indicate that the heater is in a transitory state and cannot answer with
information that is representative of the state of the heater to a request for information. The master
must repeat the operation after a few seconds.
© ASTRALPOOL 2016 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT
according to the MODBUS-RTU
.
standard described in
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