
Read/write image data
For more information visit:
www.EatonElectrical.com
MN05013001E
109
Reading and writing local analog output QA1
The commands provided can be used to access the local
analog output of the EZ800 or EZD basic unit. When writing to
the analog output, however, the value will only be output
externally if the device concerned is in Run mode and the
image concerned has not been overwritten by actual program.
J
Section “Read/write image data” on Page 99.
Example
The analog output is to output a value of approx. 5 V.
500 = 01F4
hex
Byte 5 – Data 1 (LowByte) : F4
hex
Byte 6 – Data 2 (HighByte): 01
hex
Byte
Meaning
Value (hex), sent by
Master
Slave
0
Toggle byte
J
page 94
1
Command
Read
91
–
Write
B1
–
Response
Read successful
–
C2
Write successful
–
C1
Command
rejected
–
C0
2
Len
02
02
3
Type
05
05
4
Index
00
00
5 – 6
Data 1 – 2
Read operation
00
See example
For write
operation
See example
00
7 – 8
Data 3 – 4
00
00
Содержание PROFIBUS-DP EZ204-DP
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