Handling Pkw Via Cc-Link - Siemens SIMOVERT MASTERDRIVES Operating Instructions Manual

03.99
4.8

Handling PKW via CC-Link

PLC
INDEX Command
PKE Command
READ Command
Siemens AG 6SE7087-6NX84-0GB0
SIMOVERT MASTERDRIVES
The CBL handles the PKW mechanism transparent for the user. With a
set of three command code types the user can read and modify
parameters (16 bit and 32 bit operands) and read parameter
descriptions:
♦ INDEX Command
♦ PKE Command
♦ READ Command
With the INDEX Command the user sends the index information (IND).
If he wants to write 32 bit parameter the user writes the high word
(PWE2) into written data . CBL stores the information temporarily and
acknowledges the INDEX Command . Now the user sends a PKE
Command . PKE information and low word (PWE1) is transported to
CBL. CBL merges the data (PKE, IND, PWE1 and PWE2) and sends
an PKW request to the converter. Receiving the PKW reply from
converter CBL acknowledges the PKE Command from user with a
reply code and the verified PWE1. If the user has a 32 bit operand he
can read the high word (PWE2) by an READ Command .
CC-Link
IND + PWE2
Reply: o.k (0)
PKE + PWE1
Reply: o.k. (3 or 4)
PWE1 (low word)
0C00h
Reply: o.k. (0)
PWE2 (high word)
Fig. 4-7 PKW parameter sequence (example: write 32 bit parameter)
The three command codes differ in the bit coding of bit 10 and 11 of the
command code.
Operating Instructions
CBL
PKW request
PKE
IND
PWE1
PWE2
PKW reply
PKE
IND
PWE1
PWE2
Communication via CC-Link
CU
Request channel
Reply channel
4-17