Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: doy on March 17, 2020, 04:58:28 AM
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Hello!
How to use MODBUS RTU in MACRO
The source is:
'------------------------------------------------------
rem M403 modebus test
Dim a1,a2,a3
'a1 = FillFromInput(1,1020, 2)
a1 = FillFromHolding(1,1020,8)
a2 = GetModWord(0)
a3 = GetInput(0)
Message "M403 Test End! = " & GetUserDRO(1000) & " , " & a1 & " , " & a2 & " , " & a3
'------------------------------------------------------------
result
[ M403 Test End! = 1691574, -1 , -1 , 0 ]
The '1691574' value obtained from GetUserDRO (1000) is the result of normal communication in the brain.
Manual instructions should be 1. However, -1 is output.
a1 = FillFromHolding(1,1020,8)
I would appreciate it if you let me know what needs to be fixed in the above line.