Data Type - Counter (Read) - Siemens SICAM Q200 7KG97 Manual

Use as Write Register
[dw_ControllableIndications_Write, 1, en_US]
Figure 2-6
This data format enables up to 8 commands to be transmitted via the holding register for which the ON/OFF
bits are set to either 0/1 or to 1/0. If these bits are set to 0/0 or 1/1, no evaluation will be performed.

Data Type - Counter (Read)

2.5.6
General
With the Counter data type, units of energy are transmitted as counter pulses.
To calculate the primary value, the conversion factor 'Energy per counter pulse' is output as the Measured
Value data type in addition to the counter pulses. The primary value is calculated as follows:
Primary value = number of counter pulses * energy per counter pulse
The following information is sent to each counter using the Modbus protocol:
•
Counter pulses as 32-bit values (with sign)
•
Separate status indications for invalid and overflow for each counter
•
Energy per counter pulse in floating-point format for measured values
Counter Pulses
32-bit integers with sign allow a maximum of ±2 147 483 647 counter pulses before the counter overflows.
The Counter data type is structured as follows:
[dw_CounterPulses, 1, en_US]
Figure 2-7
Bit S (Sign)
Reserved for negative metered values.
Quality Information
The two following quality bits are stored for each counter in separate holding registers:
•
Overflow OV: The internal counter pulse exceeds 31 bits. The Overflow bit is reset once the counter has
been reset.
•
Invalid IV: The counter value is invalid due to a reset/device start. The bit is deleted 1 min after the device
start.
SICAM, Multifunctional Recorder, Manual
E50417-C1040-C606-A3, Edition 03.2017
Data Type - Controllable Indications - Write Register
Data Type - Counter - Counter Pulses - Read Register
Communication Modbus
2.5 Modbus Data Format
25