Omron SYSMAC CJ1W-AD04U, Руководство по эксплуатации

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32
Exchanging Data with the CPU Unit Section 4-1
Set Values and Stored Values
Note 1. The Conversion Data Enabled Flag is OFF after the PLC is turned ON or
the Unit is restarted. The flag is turned ON when the AD conversion data
becomes stable (approximately2 to 4 s) and remains ON during operation.
2. The sensor error detection function operates when the input type is set to
thermocouple input, platinum resistance thermometer input, 1 to 5 V volt-
age input, or 4 to 20 mA current input.
Reading Process Values
Analog input process values are stored for each input number, in CIO words
n+1 to n+4.
For the CIO word addresses, n = CIO 2000 + + (10
×
unit number).
Use MOV(021) or XFER(070) to read process values in the user program.
Example 1: In this example, the process value is read from only one input.
(The unit number is 0.)
Note Temperatures are always read as 0.1 times the stored value.
Contents Set Values and Stored Values Page
Process value alarm H (high limit) 0: Process value < Set value
1: Process value
≥
Set value
P. 37
L (low limit) 0: Process value > Set value
1: Process value
≤
Set value
Process value 16-bit binary data P. 32
Conversion Data
Enabled Flag (See
note 1.) 0: Data disabled
1: Data enabled
---
Cold Junction Sen-
sor Error Flag 0: Normal
1: Error
P. 39
Sensor Error Flag
(See note 2.) 0: Normal
1: Error
---
Input types Disconnection detection level
Thermocouple input or platinum
resistance thermometer input Less than the minimum value in the input
range
−
20°C or
−
20°F, or greater than the
maximum value in input range +20
°
C or
+20°F
1 to 5 V Less than 0.3 V
4 to 20 mA Less than 1.2 mA
0 to 5 V, 0 to 10 V, or 0 to 20 mA Disconnection not detected.
Word Function Stored value
n + 1 Input 1 process value 16-bit binary data
n + 2 Input 2 process value
n + 3 Input 3 process value
n + 4 Input 4 process value
MOV(021)
2001
D00001
The process value in CIO 2001
(input number 1) is read to D00001.
Input condition