29
11.7 Diagnostics register interpretation
The diagnostics register is interpreted as follows:
A bit value of 1 means true, unless otherwise specified. The diagnostics register is read using function code 0x08 and subcode 0x02.
Bit
Description
0
Internal communication failure (with the Grundfos CIU 250).
1
EEPROM self-test failed (the test is carried out when the system is booted).
2
Grundfos CIU 250 not supported.
3
Modbus address offset is different from default value, i.e. it differs from 0.
4
Using software-defined Modbus transmission speed.
5
RESERVED
6
RESERVED
7
RESERVED
8
RESERVED
9
RESERVED
10
RESERVED
11
RESERVED
12
RESERVED
13
RESERVED
14
RESERVED
15
RESERVED