FIAMA EP46RS Kullanım ve Bakım Kılavuzu - Sayfa 8
Ölçüm Cihazları FIAMA EP46RS için çevrimiçi göz atın veya pdf Kullanım ve Bakım Kılavuzu indirin. FIAMA EP46RS 12 sayfaları. Electronic hollow shaft display with serial output
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Hollow shaft display with serial output
The system (slave) transmits by an instrument MASTER on the serial line through a protocol type MODBUS
RTU words of 8bit; 1 stop bit and parity bit according to the
The physical interface is RS-485. Every EP4-_RS has an identifying address. The protocol is based on a
QUERY/RESPONSE structure: the slave devices reply to the queries with a message that contains the
identifying address and the requested data.
Further Information on the creation of two CRC bytes are available on www.modicon.com.
The activated MODBUS commands are:
0x03: multiple reading of registers
0x10: writing of several registers.
0x06 writing of one registers.
0x03 READING OF REGISTERS
To read the registers of the instrument, the master must send a query composed as follows (every element is
a byte):
ADDRESS | 0x03 | START_REG_HI | START_REG_LO | N_REG_HI | N_REG_LO | CRC_HI | CRC_LO
-
START_REG_HI | START_REG_LO is the address at the starting 16 bit for the reading
-
N_REG_HI | N_REG_LO is the number (16 bit) of the registers to be read
The instrument replies with the following message:
ADDRESS | 0x03 | NBYTE | DATA_1_HI | DATA_1_LO | DATA_2_HI | DATA_2_LO | ... | CRC_HI | CRC_LO
DATA_1_HI | DATA_1_LO | DATA_2_HI | DATA_2_LO | ... is the sequence of the data read.
NBYTE is the number of the given bytes that follow
DATA_1_HI | DATA_1_LO | DATA_2_HI | DATA_2_LO | ... is the stream of data read.
0x10 WRITING OF REGISTERS
To write the registers of the instrument, the master must send a query composed as follows (every element is
a byte):
ADDRESS | 0x10 | START_REG_HI | START_REG_LO | N_REG_HI | N_REG_LO | NBYTE | DATA_1_HI |
DATA_1_LO | DATA_2_HI | DATA_2_LO |...... | CRC_HI | CRC_LO
The instrument replies with the following message:
ADDRESS | 0x10 | START_REG_HI | START_REG_LO | N_REG_HI | N_REG_LO | CRC_HI | CRC_LO
Connection scheme
1 10 ÷ 30VDC positive power supply
2 GND negative power supply
3 RS+ RS485 serial port positive
4 RS– RS485 serial port negative
Male connector: 4 pin M12x1 A-coding.
The pin configuration of both connectors is identical.
Please pay attention: an incorrect electrical connection could damage the unit.
Date: 06/04/21
File: EP4RS_4.1_ing.doc
EP43RS / EP46RS
constant which is set.
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Rev: 4.1
Page: 8/12