Communication
2.2 Modbus
27SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
Use as Write Register
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.
2.2.6.5 Data Type - Counter (Read)
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 (see chapter 2.2.6.1). The primary value is calcu-
lated 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 (see chapter 2.2.7.23)
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:
Bit S (Sign)
Reserved for negative metered values
ON
Holding register 0141
OFF
Indication 8
ON OFF
Indication 7
ON OFF
Indication 1
ON OFF
Indication 2
ON OFF
Indication 3
ON OFF
Indication 4
ON OFF
Indication 5
ON OFF
Indication 6
Byte 3 (MSB) Byte 2 Byte 1
S
Holding register 08xx
Byte 0 (LSB)
Counter (31 Bit)
... ...
Holding register 08xx+1
SYS_SICAM_Q100_US.book Page 27 Thursday, September 24, 2020 1:17 PM
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