Hitachi SJ-PB(T) - Manual (Page 15)

CHAPTER5 OPERATING
11
5.2 PKW-part
The parameter part (PKW) is fixed to 4 words and can be used for reading and/or updating the parameters in the
inverter one by one. Requests and responses is a handshake procedure and cannot be batched, meaning that if
the master sends out a read/write request, it has to wait for the response, before it sends a new request.
The PKW is further divided into three parts; PKE- Parameter ID (2 bytes), IND – Sub-index (2 bytes) and PWE-
Parameter value (4 bytes).
PKW PZD
PKE IND PWE PZD1
STW
ZSW
PZD2
HSW
HIW
PCD3 PCD4 PCD5 PCD6 PCD7 PCD8 PCD9 PCD10
PKW: Parameter ID/value.
PKE: Parameter ID.
IND: Sub-index (3
rd byte, 4 th byte is reserved).
PWE: Parameter value (4 bytes).
PKE handling:
b
15
b
14
b
13
b
12
b
11
b
10
b
9
b
8
b
7
b
6
b
5
b
4
b
3
b
2
b
1
b
0
AK SPM PNU
Figure 5-1 PCA word
AK: Request/response characteristics (Range 0-15)
SPM: Toggle bit for Spontaneous Messages, not used by SJ-PB(T).
PNU: Parameter number. Range 1- 418 for Hitachi specific parameters and 900-999 for Profidrive specific parameters.
Please refer to chapter 3.5 for which Profidrive specific parameters that are supported.