Table of Contents
Advertisement
Communication
2.2 Modbus
2.2.6.3 Data Type - Indications (Read)
The Indications data type is represented by two bits in holding registers:
Q
V
Indication 8
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
Q
Indication 8
Where:
•
Q: status/quality bit: 0 = OK, 1 = invalid
•
V: Value bit: 0 = OFF, 1 = ON
See also chapter 2.2.6.3.
26
Q
V
Q
V
Indication 7
Indication 6
for example Holding register 0101
V
Q
V
Q
V
Indication 7
Indication 6
Q
V
Q
V
Q
Indication 5
Indication 4
Indication 3
Q
V
Q
V
Indication 5
Indication 4
Holding register 0141
V
Q
V
Q
Indication 2
Indication 1
Q
V
Q
V
Q
Indication 3
Indication 2
Indication 1
SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
V
V
Hide quick links:
Advertisement
Table of Contents
