Inverter Profibus Data Word Definition - Mitsubishi Electric FR-A5NP Instruction Manual

5. INVERTER PROFIBUS DATA WORD DEFINITION

This chapter describes the basic structure of the PROFIBUS-DP data
word and how it is implemented within the inverter. For examples of
commonly used commands and how they may be implemented, please
refer to page 38 in this manual.
(1) This option unit acts as a PROFIBUS-DP slave to a PLC or equivalent
controller acting as a PROFIBUS-DP master class 1 on an RS-485
network.
This means that the option unit:
• acknowledges messages received, and
• transmits messages at the request of a network master.
(2) The option unit can also act as a PROFIBUS-DP slave to a
PROFIBUS-DP master, which can read the drive's I/O values, as well
as configure the drive itself. Please refer to PROFIBUS Specifications.
(3) The option unit cannot send messages on its own, and it has no bus
access rights. It also cannot simultaneously act as a slave to network
master and as a lead drive (master) to follower drives (slaves).
(4) To provide access to inverter operation data, this option unit uses a
manufacturer-specific PROFIBUS Profile (data buffer). This Profile
consists of the following 6 words (12 bytes):
Word Id
1 PKE
2 IND
3 PWE1
4 PWE2
5 ZSW1
6 HIW
REMARKS
Messages from Master to Slave are called Command Requests.
Messages from Slave to Master are called Command Responses.
Parameter Number (PNU) and Task or response Id (AK)
Parameter Index (category)
Not used and must be set to 0
Parameter Value
Inverter Status word.
Used for slave-to-master messages only.
For master-to-slave messages, this word is not used and
must be set to 0.
Not used and must be set to 0
16
Definition