7 signal types and scaling, Signal types and scaling, Preface and general information – Lenze ECSCAxxx User Manual
Page 27
Preface and general information
System block introduction
Signal types and scaling
l
27
EDBCSXA064 EN 3.2
1.5.7
Signal types and scaling
A signal type can be assigned to most inputs and outputs of the Lenze function
blocks/system blocks. The following signal types are distinguished:
ƒ
digital and analog signals
ƒ
position and speed signals
The identifier of the corresponding input/output variable has an ending (starting with an
underscore). It indicates the signal type.
Signal
Ending
Memory
Scaling
(external size
º internal size)
Type
Symbol
Analog
h
_a (analog)
16 Bit1
100 %
º 16384
Digital
g
_b (binary)
1 bit
0
º FALSE; 1 º TRUE
Angular
difference or
speed (rot.)
F
_v (velocity)
16 Bit1
15000 rpm
º 16384
l
Angular difference/speed ref. to 1 ms
l
Normalisation example:
1 motor revolution
+ 65536 [inc]
Variable value (..._v)
+
15000
60000 [ms]
@ 65536 [inc] + 16384
ƪ
inc
ms
ƫ
Speed (on motor side)
+ 15000 [rpm] + 15000
60 [s]
Angle or position
E
_p (position)
32 Bit
1 motor revolution
º 65536
High Word
Low Word
0
31
Direction (0 º clockwise rotation; 1 º counter−clockwise rotation)
No. of motor revolutions (0 ... 32767)
Angle or position (0 ... 65535)
Due to their scaling, analog signals have an asymmetrical resolution range
(−200 % ... +199.99 %):
External:
−200 %
−100 %
0 %
+100 %
+199.99 %
Internal:
−32768
−16384
0
+16384
+32767