Sample Program 9 (Measuring Range Combination) - Beckhoff EPP3504-0023 Short Manual

Note on loading the program: Preparation to start the sample program (tpzip file/ TwinCAT 3) [} 85]
Program description
This sample program reads several CoE Objects of the box module and yet 0x10F3 „Diagnosis History"
[} 65] that contains user specific diagnosis data:
Diagnosis message No.01...16 (0x10F3:06...0x10F3:15). Format of a message (consider little endian):
[dddd cccc ffff mmmm tttttttttttttttt pppp
dddd = DiagCode: z.B. (00 E0): 0xE000 standard Beckhoff Message
cccc = ProductCode (21 50): 0x5021 = Code for ELM
ffff = Flags, amongst others indication of the number (i) of parameters (pppp kk) to be given.
E.g. (02 00) = 0x0002; bit 4 is set, when not in DC operation
mmmm = Message ID – respective text can be found here: basic principles of diag messages [} 219]
tttttttttttttttt = TimeStamp
pppp = Datatype of the parameters, e.g. (05 00) = 0x0005 for datatype UINT8
(i)
kk = parameter value
(i)
e.g. 2 x UINT8 parameters as indicated by ffff (Flags), with values 0x3C and 0x89
= "05003C050089"
The further procedure is described in section TwinCAT Quickstart, TwinCAT 3, Starting the controller [} 152].
4.3.8

Sample program 9 (measuring range combination)

Note on this chapter: The use of EL3751/ELM3xxx terminals also applies accordingly to EPP35xx.
In some applications it can be of interest to measure a value with very fine resolution in a small range, but
still detect high deflections. If it is an AC/DC signal that has to be resolved around 0, the following approach
can be used: Two inputs of an ELM terminal are electrically connected to simultaneously measure the signal,
but with different measuring ranges.
EPP3504-0023
kk ]
(i) (i)
Version: 1.2
Commissioning
107