GUILCOR AR004798, Руководство пользователя, Страница: 21 / 29

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Modbus TCP
Device supports Modbus protocol for communication with SCADA systems. Device use
Modbus TCP protocol. TCP port is set to 502 by default. Port can be changed using web
interface. Only two Modbus clients can be connected to device at one moment. Modbus
device address (Unit Identifier) can be arbitrary. Modbus write command is not supported.
Specification and description of the Modbus protocol is free to download on:
www.modbus.org.
Supported Modbus commands (functions):
Command Code Description
Read Holding Register (s) 0x03 Read 16b register(s)
Read Input Register(s) 0x04 Read 16b register(s)
Modbus device registers. Address could be by 1 higher, depending on type used
communication library:
Address [DEC] Address [HEX] Description Type
39970 0x9C22 1st two digits from serial number BCD
39971 0x9C23 2nd two digits from serial number BCD
39972 0x9C24 3rd two digits from serial number BCD
39973 0x9C25 4th two digits from serial number BCD
39974 0x9C26 Device type Int16b
39975, 39976 0x9C27, 0x9C28 Current on channel [uA] Int16b
39977 – 39978
39979 – 39980
0x9C29 – 0x9C2A
0x9C2B – 0x9C2C
Actual value channel1
Actual value channel2 Float32b
39981, 39982 0x9C2D, 0x9C2E Actual value Int16b
39983, 39984 0x9C2F, 0x9C30 Actual value Int16b*10
39985, 39986 0x9C31, 0x9C32 Actual value Int16b*100
39987, 39988 0x9C33, 0x9C34 Unit on the channel Ascii
39989, 39990 0x9C35, 0x9C36 Channel alarm state uInt16b
39991 – 39999 0x9C37 – 0x9C3F Unused n/a
40000 0x9C40 Channel 1 actual value Int16b*10
40001 0x9C41 Channel 1 alarm status Ascii
40002 0x9C42 Channel 1 current [uA] Int16b*10
40003 – 40004 0x9C43 – 0x9C44 Channel 1 Actual value Int32b*100
40005 0x9C45 Unused n/a
40006 0x9C46 Channel 2 actual value Int*10
40007 0x9C47 Channel 2 alarm status Ascii
40008 0x9C48 Channel 2 current [uA] Int16b*10
40009 – 40010 0x9C49 – 0x9C4A Channel 2 Actual value Int32b*100
40011 0x9C4B Unused n/a
Description:
Int16b registry range is -31999 to 32767, error value <= -32000
Int16b*10 registry is in format integer*10 – 16 bits, 12.5dgrC = 125, error value
<= -32000
Int16b*100 registry is in format integer*100 – 16 bits, 12.53dgrC = 1253, error
value <= -3200