Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Tue, 7 Apr 2015 11:04:08 +0000

Look at modbusApp/Db/ai.template and ao.template.  They do the scaling on input and output.

You define the EGUL and EGUF macro parameters, which are the engineering units at the minimum and maximum word values respectively.

Mark

________________________________
From: [email protected] [[email protected]] on behalf of JaeRyong Seo [[email protected]]
Sent: Tuesday, April 07, 2015 4:43 AM
To: [email protected]
Subject: problem scale word data

Hi, all

for communication with PLC via using modbus, I used modbusR2-5 version.

i want to know how to scale word data.

for example.
this is Trans1.substitution file
file "../../db/mbbiDirect.template" { pattern
{P, R, PORT, OFFSET, MASK, SCAN}
{CIS:TRANS1:, YWIn10, T1_Yn_In_Word, 0x10, 0xFFFF, "I/O Intr"}
{CIS:TRANS1:, YWIn11, T1_Yn_In_Word, 0x11, 0xFFFF, "I/O Intr"}
}
file "../../db/intarray_in.template" { pattern
{P, R, PORT, NELM, SCAN}
{CIS:TRANS1:, YWIn0Array, T1_Yn_In_Word, 80, "I/O Intr"}
}
file "../../db/asynRecord.template" { pattern
{P, R, PORT, ADDR, TMOD, IFACE}
{CIS:TRANS1:, YWIn0Asyn, T1_Yn_In_Word, 0, Read, asynInt32}
}
file "../../db/statistics.template" { pattern
{P, R, PORT, SCAN}
{CIS:TRANS1:, YWIn0St, T1_Yn_In_Word, "10 second"}
}
file "../../db/poll_delay.template" { pattern
{P, R, PORT}
{CIS:TRANS1:, YWIn0PollDelay, T1_Yn_In_Word}
}

# These are the Yn outputs done with bit access. Y0-Y7
file "../../db/bo_bit.template" { pattern
{P, R, PORT, OFFSET, ZNAM, ONAM}
{CIS:TRANS1:, YWOut10, T1_Yn_Out_Word, 0x10, 0xFFFF, "I/O Intr"}
{CIS:TRANS1:, YWOut11, T1_Yn_Out_Word, 0x11, 0xFFFF, "I/O Intr"}
}
file "../../db/asynRecord.template" { pattern
{P, R, PORT, ADDR, TMOD, IFACE}
{CIS:TRANS1:, YWOut0Asyn, T1_Yn_Out_Word, 0, Read, asynInt32}
}
file "../../db/statistics.template" { pattern
{P, R, PORT, SCAN}
{CIS:TRANS1:, YWOut0St, T1_Yn_Out_Word, "10 second"}
}
file "../../db/poll_delay.template" { pattern
{P, R, PORT}
{CIS:TRANS1:, YWOut0PollDelay, T1_Yn_Out_Word}
}

and this is log file
[sjr@localhost ~]$ caget CIS:TRANS1:YWInA
CIS:TRANS1:YWInA 200
[sjr@localhost ~]$ caput CIS:TRANS1:YWOutA 250
Old : CIS:TRANS1:YWOutA 200
New : CIS:TRANS1:YWOutA 250
[sjr@localhost ~]$ caget CIS:TRANS1:YWInA
CIS:TRANS1:YWInA 250
[sjr@localhost ~]

there is need to display value of CIS:TRANS1:YWInA after change scale via using medm.
(ex. if received data from plc is 200, need to display 2.00 )
and also need to send user-input data to PLC after change scale
(ex. if user input 5.00 , need to send 500 to plc)

I need some hints for solve this problem.

regards,
JaeRyong

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System