Lenze DDS v2.0 - Manual (Page 24)

Introduction to IEC 61131-3 programming
Appendix
22
L
DDS-IEC61131 EN 2.0
6.2.4 Identifier
The identifier is the proper name of a variable and should indicate the application or function of the
variable.
•
Identifiers always start with a capital letter.
•
If an identifier is assembled from several ” words” , then each ” word” must start with a capital
letter.
•
All other letters are written in lower case.
Examples of identifiers:
JogValue
NumberOfValues
CurrentSelectedJogValue
6.2.5 Indication of the signal type
In general, it is possible to assign a certain signal type to the inputs and outputs of Lenze function
blocks/system blocks. There are digital, analog, position and speed signals.
A corresponding ending (preceded by an underscore) is added to the identifier of the input/output
variable to indicate the signal type.
Signal type Ending Memory Normalization
(external value ≡≡≡≡ internal value)
Previous
designation
analog _a (analog) 16 bits 100 % ≡ 16384 H
digital _b (binary) G
Phase-angle difference or
speed _v (velocity) 16 bits 15000 rpm ≡ 16384 F
Phase-angle or position _p (position) 32 bits 1 motor revolution ≡ 65535 E
6.2.6 Examples of variable identifiers
Variable identifier Assigned
system block Variable type Data type Signal type Application/function
g_anFixSetSpeedValue_a - VAR_GLOBAL Array (Integer) analog Array for fixed setpoints
CAN2_nOutW1_a CAN2_IO - Integer analog Output word 1 of CAN2_OUT
AOUT1_nOut_a AOUT1 - Integer analog Output analog signal
bQSP_b - - Bool binary
(TRUE/FALSE) Activation of quick stop
byFunction - - Byte - Function selection
dnIn1_p - - Double Integer position Phase input signal 1
nVp - - Integer - Gain
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