Input Types And Data Conversion - Omron SYSMAC CJ1W-AD04U Operation Manual

Input Types and Data Conversion

Input Conversion and Alarm Output Functions
2-2 Input Types and Data Conversion
Voltage and Current Inputs
12
Items
Measurement method for
platinum resistance ther-
mometer inputs
Allowable lead wire
resistance
Note 1. Input signal ranges can be set for each input.
2. Use the analog input voltage/current value within the specified input signal-
range. Exceeding the specified range may result in malfunction.
3. A/D conversion time is the time it takes for an analog signal to be stored in
memory as converted data after it has been input. It takes at least one cy-
cle before the converted data is read by the CPU Unit.
Item
Process value alarms
ON-delay timer
Scaling
(Voltage and current
inputs)
Zero/span adjustment
Sensor error detection
Cold junction sensor
error
Note Sensor error detection is effective only when the input type is set to thermo-
couple input, platinum resistance thermometer input, 1 to 5 V input, or 4 to
20 mA input. The Sensor Error Flag will be turned ON if there is no input sig-
nal from the thermocouple input, platinum resistance thermometer input, 1 to
5 V input, or 4 to 20 mA input.
In addition to voltage and current inputs, the temperature sensors listed below
can be connected directly to a Universal Input Unit.
Voltage/current input
Voltage input (DC) 1 to 5 V
Current input (DC) 4 to 20 mA 0048 (0030 hex)
3-wire method
20 Ω max. per wire
Two alarms (high and low) with hysteresis. The alarms
can be set separately for each input.
0 to 60 s, independently settable for each input
Any industrial units can be set by setting the upper and
lower limits in the range of −32,000 to 32,000. These lim-
its are converted as full scale.
Each input can be set independently.
• Zero adjustment (offset) range: ±9,999 (LSB)
• Span adjustment (gain) range: 0 to 32,000 (×0.0001)
Each input can be set independently.
Detects sensor error at each input and turns ON the Sen-
sor Error Flag. (See note.)
Detects errors in the cold junction sensor. and turns ON
the Cold Junction Sensor Error Flag.
DM Area setting
0050 (0032 hex)
0 to 5 V 0053 (0035 hex)
0 to 10 V 0054 (0036 hex)
0 to 20 mA 0049 (0031 hex)
Section 2-2
Specifications
Specifications