IFM Ecomat 300 AC1355, Дополнительное руководство по устройству

Страница: 115 / 248

DP module 12: Extended command channel
Module 12, extended command 35dec (23hex):
write parameter character string of an AS-i slave with the profile S-7.4
9-39
Response from controllere (gateway)
Bit
Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1
E=0
S
0/1
M
0/1
reflected user ID reflected command number = 23
hex
2
R R slave address F=0 R R number of bytes to be sent
3…18
not changed
Legend → page 9-3
Example:
Word no. Value [hex] Description
1 0923
S=0: data transfer completed
M=0: AS-i master 1
x9 = reflected user ID 9
23 = reflected command number 35
2
0
604
or
8
604
06 = slave address shifted by 1 bit to the left
→
3 * 2 = 6
04 = 4 bytes ID data to be sent
the most significant bit (TG) changes after each execution
3…18 0000 not changed
NOTE
• The number of bytes to be sent must be divisible by 2 since the system always transmits only
multiples of 2 bytes in the S7.4 protocol.
•
The control bytes defined in profile 7.4 with follow and valid bits are completed by the system.
Therefore, without segmentation, this command is limited to 20 bytes of parameter data. Larger
data volumes must be divided into segments.