14
MODBUS OVER SERIAL LINE (RS485)
INTERFACE
SUPPORTED FUNCTIONS
Baud rate
9600
Read register
0x03, 0x04
Format
8 data, No parity, 1 stop
Write single register
0x06
Reply delay (ms) 20
Write multiple register
0x10
The list below includes all available addresses (R = Read, W = Write):
Address
Length
(words)
Description
R/W
0x0000
1
MODBUS slave ID (slave address) of PM180
R/W
0x0001
7
Device identification string in ASCII
R
"PM180vx.xx" where x.xx is the firmware version
0x0008
2
Serial number
R
0x000A
2
Data acquisition sample interval (1 to 86400 seconds)
R/W
0x000C
2
Number of samples to be logged (0 to 86400 samples) -
note: enter 0 to log continuously
R/W
0x000E
1
Data acquisition enabled (0 for disabled, 1 for enabled)
R/W
0x000F
1
Data acquisition start time: Hours (0 to 23)
R/W
0x0010
1
Data acquisition start time: Minutes (0 to 59)
R/W
0x0011
1
Data acquisition start time: Seconds (0 to 59)
R/W
0x0012
1
Data acquisition start time: Day (1 to 31)
R/W
0x0013
1
Data acquisition start time: Month (1 to 12)
R/W
0x0014
1
Data acquisition start time: Year (2012 to 2105)
R/W
0x0015
1
Alarm log settings
R/W
Bit 0 - Log trigger time
Bit 1 - Log while triggered
Bit 2 - Log acknowledge time
Bit 3 - Log reset time
0x0020
1
Remote request - Start logging
R/W
Write 1 - request start of data logging
Read 1 - request pending, Read 0 - no request pending
0x0021
1
Remote request - Stop logging
R/W
Write 1 - request termination of data logging
Read 1 - request pending, Read 0 - no request pending
0x0022
1
Remote request - Acknowledge alarms
R/W
Write 1 - request acknowledgement of alarms
Read 1 - request pending, Read 0 - no request pending
0x0023
1
Remote request - Reset alarms
R/W
Write 1 - request reset of alarms
Read 1 - request pending, Read 0 - no request pending
NOTES:
1 For further information please refer to http://www.modbus.org/specs.php
2 Use address 255 to communicate with any connected unit (only one sensor connected)
3 Use address 0 to broadcast to all connected units (no response expected)
Содержание PyroMiniBus Series
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Страница 12: ...12 ELECTRICAL CONNECTION...