151 • HRVS-DN Communication (Profibus protocol)
_______________________________________________________________________________________________
Write a data request. This method can only be used with DPV1. The change can be made after
communication has already been established.
17.3.3.1
Selection of the DPV0 Registers by the GSD
The GSD file contains a list of parameters at lines 190 to 288.
The parameters appear in blocks, each block contains 4 lines, and each block refers to one register (there are
20 blocks representing 20 registers).
190:
ExtUserPrmData = 1001 "INDIREC PAR 1"
191:
Unsigned16
1
1-1000
192:
Prm_text_Ref = 100
193:
EndExtUserPrmData
194:
196:
ExtUserPrmData = 1002 "INDIREC PAR 2"
197:
Unsigned16
2
1-1000
198:
Prm_text_Ref = 100
199:
EndExtUserPrmData
200:
201:
ExtUserPrmData = 1003 "INDIREC PAR 3"
202:
Unsigned16
3
1-1000
203:
Prm_text_Ref = 100
204:
EndExtUserPrmData
205:
………………
………………
284:
285:
ExtUserPrmData = 1020 "INDIREC PAR 20"
286:
Unsigned16
40
1-1000
287:
Prm_text_Ref = 100
288:
EndExtUserPrmdata
Code 2 – GSD file, the part that is responsible for displaying the registers in DPV0 (cyclic)
The second line of each block begins with “
Unsigned16
”, followed by the register number (shown above in
green).
The list of register numbers appears in section
17.8 on page 161.
17.3.3.2
Selection of the DPV0 Registers through Data Request (DPV1)
By writing to Slot number 1 and Index 2, you can change the register that appears in DPV0.
Remember that for each register there are 16 bits (two bytes/one word). The first byte represents the high
value of the register number.
To demonstrate this, let’s say that we want to see the following registers in DPV0 (cyclic):
1. Logic Status.
2.
I1
.
3.
I2
.
4.
I3
.
5.
Voltage
.
6.
Ctrl-In
.
7.
Ctrl_Out (relays)
.
8.
Power
.
9.
Power Factor
.
10. Frequency.
