Omron SYSMAC CJ1W-AD04U, Руководство по эксплуатации

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Detailed Description of User Settings Area Data Section 4-2
4-2-5 Sensor Error (Disconnection) Detection and Operation
It is possible to detect a disconnected input circuit if the input type is set to
thermocouple input, platinum resistance thermometer input, 1 to 5 V voltage
input, or 4 to 20 mA current input.
Note 1. The sensor error detection level varies with the zero and span adjustment
values.
2. This function cannot be used when the input type is set to a 0 to 5 V voltage
input, 0 to 10 V voltage input, or 0 to 20 mA current input. Bits 00 to 03 of
n+9 contain the Sensor Error Flags.
Example: In this case, the converted value is read only when analog input 1 is
not disconnected. (The unit number is 0.)
When a sensor error is detected, the process value can be fixed at the highest
value or lowest value.
The allowable range limits are as follows:
• Temperature Input
Upper limit: Upper limit of temperature range +20
°
C or +20
°
F
Lower limit: Lower limit of temperature range
−
20°C or
−
20
°
F
• Voltage/Current Input
Upper limit: 105%
Lower limit:
−
5%
Input type 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 voltage input Less than 0.3 V
4 to 20 mA current input Less than 1.2 mA
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Input 4 Input 3 Input 2 Input 1
Word n+9
Bit
If a disconnection is detected in an input, the corresponding flag above is
turned ON. The flag is turned OFF when the disconnection is corrected.
MOV(021)
2001
D00001
Conversion data in CIO 2001
(input number 1) is read to D00001.
2009.00