Function 06: Preset Single Register; Function 07: Read Exception Status - Siemens ATC5300 Manual

General Information

1.7 Function 06: Preset Single Register

1.7 Function 06: Preset Single Register
This function allows to write in the registers. It can be used only with registers with address
higher than 1000 Hex. For instance it is possible to change setup parameters. If the value is
not in the correct range, the ATC will answer with an error message. In the same way, if the
parameter address is not recognised, the ATC will send an error response.
The address and the valid range for each parameter are indicated in Tables 5, 6 and 7. With
function 06, some commands (like passing from MAN to AUT and vice versa) can be possibly
executed sending the addresses and the values reported in Table 4.
Master message:
Slave address
Function
MSB register address
LSB register address
MSB data
LSB data
MSB CRC
LSB CRC
Slave response:
The slave response is an echo to the query, that is the slave sends back to the master the
address and the new value of the variable.
1.8

Function 07: Read Exception Status

This function allows to read the status of the automatic transfer switch.
Master query:
Slave address
Function
MSB CRC
LSB CRC
The following table gives the meaning of the status byte sent by the ATC as answer:
10
BIT
0
1
2
3
4
5
6
7
Modbus Communication Protocol, Edition 03/2011, A5E02469001-02
08h
06h
16h
03h
00h
1Eh
FDh
13h
08h
07h
47h
B2h
MEANING
Operative mode OFF / Reset
Operative mode MAN
Operative mode AUT
Operative mode TEST
Error on
AC power supply present
DC power supply present
Global alarm on
ATC5300