(DIN) EN IEC 81346-2 lists a table with letters for different devices:
M = all mechanical movements = axis, cylinders, etc.
K = converting an input signal to another output signal
B = detecting and showing information
Q = change of energy
T = transformator, inverter
S = detecting human input
A = not allowed anymore
That means
Axis/Drives:
motor: M
inverter: T
brake: Q
Pneumatic cylinder:
Moving cylinder: M
Relais that is transforming the 24V signal from PLC into switching compressed air: K
Valve: Q
End position sensor: B
In Control plus Studio we are connecting the peripherals with objects and Control plus Studio automatically generates the item designator into the HMI. The fieldbus devices and I/O are the axis controller (T) and PLC output (K). That means the HMI shows these information. More universal regarding the norm would be a M for both in the HMI, but then you must edit the item designator of every object/unit manually.
The name of the units in the application you can choose by yourself. I prefer T for axis object and K for BasMove to be consistent with the peripheral names (and to be consistent with the HMI if you use the automatical generated item designator).
PS: Example project Digital Machine will be updated regarding this topic.
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