Omron C200H-MC221 - Details of Data Transmission and Reception Units

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4-4 Details of Data Transmission and Reception Units
4-4-1 Data Transmission and Reception Units
This section explains units used for data transmission and reception.
Data Description
Position data Three words are used to transmit or receive a position data item.
The following is the configuration of a BCD position data item.
Example 1: The following is the configuration of a position data value of 123.45.
Example 2: The following is the configuration of a position data value of 12345.
A position data item uses three words. Therefore, the total words of position data to be
transmitted or received are as follows:
Total words = 3 words x No. of data items
x10
3
x10
2
x10
1
x10
0
0
x10
7
0
x10
6
0
x10
5
A
x10
4
j+0
j+1
j+2
Decimal point A = 0 (Indicates 1)
= 1 (Indicates 0.1)
= 2 (Indicates 0.01)
= 3 (Indicates 0.001)
= 4 (Indicates 0.0001)
Words (j: Optional)
3 2 1 0 bit
Sign bit
0: Positive
1: Negative
Position data
x10
7
2345
0
0
0
0
0
0
2
1
j+0
j+1
j+2
2345
0
8
0
0
0
0
0
1
j+0
j+1
j+2
System parameters
Monitoring data
Special data
Two words are used to transmit or receive a system parameter, monitoring data item, or
special data item.
The following is the configuration of a parameter, monitoring data item, or special data
item.
Unlike position data, only one data item can be transmitted or received at a time.
Therefore, the total number of words for transmitting or receiving is as follows:
Total number of words = 2 (fixed)
j+0
j+1
Word (j: Optional)
Data may be BCD or binary.
Details of Data Transmission and Reception Units
Section 4-4