Microsensor MFE600C, Руководство по эксплуатации

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15
Figure 5
When the electromagnetic flow is installed at the rear end of the valve and the valve is not fully open, the
plug-in electromagnetic flowmeter and the rear end of the valve must be at least the first 20D straight
pipe section, as shown in Figure 6.
Figure 6
8 Modbus RTU communication
Communication connection RS485 or RS232, Baud rate range 600-9600, communication parameter:
Baud rate, N, 8, 1.
Instrument terminal T+
（
A
）
, T-
（
B
）
and COM.
Communication protocol conforms to MODBUS RTU protocol. In instruction table register number is
register address.
Composition of communication information: Address code - Function code - Data segment - CRC, A
message is sent and received continuously, and the character interval cannot be greater than one
character, otherwise it is regarded as the beginning of a new message or the end of the previous
message. The message body consists of hexadecimal numbers.
Data definition: The cumulative amount is a 16-byte hexadecimal fixed point number, and the
instantaneous amount (including flow, velocity, etc.) is a 4-byte IEEE 754 single-precision floating point
number.
Communication command: Function code 03
（
or 04
）
- reading display data
Send Receive
01 Address 01 Address