Read/write image data
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MN05013001E
57
Example:
A voltage signal is present at analog input 1. The required
telegrams for reading the analog value are as follows:
Table 14: Example telegram for reading the value at the analog
input
Byte 5 – Data 1 (Low Byte): 4B
hex
Byte 6 – Data 2 (High Byte): 03
hex
J
corresponding 16-bit value: 034B
hex
= 843
The value 843 corresponds to the IO bit value of the analog
converter. The following conversion is required for the actual
analog value:
Byte
Meaning
Value (hex), sent by
Master
Slave
0
Toggle byte
J
page 44
1
Command: Read
88
–
Response:
Read successful
–
C2
2
Len
02
02
3
Type
8C
8C
4
Index
02
1
02
1
5 Data
1
00
4B
6 Data
2
00
03
7 Data
3
00
00
8
Data 4
00
00
1) 02 = Analog input I11
10 V
×
IO bit value =>
10 V
×
843 = 8.24 V
1023
1023