GE AF-650 GP Design Manual page 188

10.4.11 Data Types Supported by AF-650 GP
Unsigned means that there is no operational sign in the telegram.
10.4.12 Conversion
The various attributes of each parameter are displayed in the section Factory
Settings. Parameter values are transferred as whole numbers only. Conver-
sion factors are therefore used to transfer decimals.
Par. F-16 Motor Speed Low Limit [Hz] has a conversion factor of 0.1.
To preset the minimum frequency to 10 Hz, transfer the value 100. A conver-
sion factor of 0.1 means that the value transferred is multiplied by 0.1. The
value 100 is thus perceived as 10.0.
10.4.13 Process Words (PCD)
The block of process words is divided into two blocks of 16 bits, which always occur in the defined sequence.
Control telegram (master⇒slave Control word)
Control telegram (slave ⇒master) Status word
Data types
3
4
5
6
7
9
10
13
33
35
Conversion table
Conversion index
74
2
1
0
-1
-2
-3
-4
-5
PCD 1
AF-650 GP Design Guide
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
Byte string
Time difference
Reserved
Bit sequence
Conversion factor
0.1
100
10
1
0.1
0.01
0.001
0.0001
0.00001
PCD 2
Reference-value
Present outp. frequency
10
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