Communication
2.2 Modbus
26 SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
2.2.6.3 Data Type - Indications (Read)
The Indications data type is represented by two bits in holding registers:
Where:
• Q: status/quality bit: 0 = OK, 1 = invalid
• V: Value bit: 0 = OFF, 1 = ON
Status or Quality Bit Q
If the indication is invalid, the quality bit is set to 1. The value bit can be ignored in this case.
Example: The power frequency is invalid if the voltage is smaller than 15 % of the rated voltage when
measuring the frequency. Any limit violation indication based on this value is also invalid.
Value Bit V
The value bit indicates whether an indication is ON (=1) or OFF (=0).
2.2.6.4 Data Type - Controllable Indications (Read and Write)
The Controllable Indications data type is needed for:
• The binary outputs of the SICAM Q100
• Processing internal device commands (for example resetting the energy counters).
The holding register is used for read and write access in this context.
Use as Read Register
Where:
• Q: status/quality bit: 0 = OK, 1 = invalid
• V: Value bit: 0 = OFF, 1 = ON
See also chapter 2.2.6.3.
Q
for example Holding register 0101
V
Indication 8
Q V
Indication 7
Q V
Indication 1
Q V
Indication 2
Q V
Indication 3
Q V
Indication 4
Q V
Indication 5
Q V
Indication 6
Q
Holding register 0141
V
Indication 8
Q V
Indication 7
Q V
Indication 1
Q V
Indication 2
Q V
Indication 3
Q V
Indication 4
Q V
Indication 5
Q V
Indication 6
SYS_SICAM_Q100_US.book Page 26 Thursday, September 24, 2020 1:17 PM
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