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5. How to Control the FC 300
5.1.1. Process Data
The Process Data provides an agile way of controlling the FC 300 frequency converter. Two different telegram-types are for process data are supported:
•
Standard Telegram 1, is a telegram with 4 PCD’s. The two first PCD’s is for holding Control word and reference for Master-to-slave comm. And
Status word and Main Actual Value for Slave-to-master comm. The last two PCD’s (3 and 4) is reserved for future use, and contains only 0’s.
•
Custom Telegram 1, is a telegram with 4 PCD’s that in addition also holds information on digital and analogue I/O’s and torque limit.
See section
How to Install
for more information on how to select the different telegram profiles.
5.1.2. Standard Telegram 1
The Process Data length is fixed to 4 words, each of two bytes, with the following format:
Master
slave
→
PCD
Name
Function
1
Control Word
Sends the Control Word to the frequency converter. The format depends of the setting of par.
8-10.
2
Reference
Sends the reference in %. See section:
Bus speed reference value.
Slave
master
→
PCD
Name
Function
1
Status Word
Sends the Status word from the frequency converter. The format depends of the setting of par.
8-10.
2
Actual value
Sends actual output frequency in %. See section:
Bus speed reference Value.
FC 300 Interbus Operating Instructions
5. How to Control the FC 300
MG.33.H3.02 - VLT is a registered Danfoss trademark
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