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Operating Procedure Section 6-2
6-2 Operating Procedure
Follow the procedure outlined below when using Analog I/O Units.
Installation and Settings
1,2,3... 1. Set the operation mode switch on the rear panel of the Unit to normal
mode.
2. Set the voltage/current switch at the back of the terminal block.
3. Wire the Unit.
4. Use the unit number switch on the front panel of the Unit to set the unit
number.
5. Turn ON the power to the PLC.
6. Create the I/O tables.
7. Make the Special I/O Unit DM Area settings.
• Set the I/O numbers to be used.
• Set the input and output signal ranges.
• Set the number of mean processing samplings.
• Set the output hold function.
• Set the ratio conversion usage, the ratio set value, and the bias value.
8. Turn the power to the PLC OFF and ON, or turn ON the Special I/O Unit
Restart Bit.
When the input or output of the connected devices needs to be calibrated, fol-
low the procedures in Offset Gain Adjustment below. Otherwise, skip to Oper-
ation below.
Offset and Gain Adjustment
1,2,3... 1. Set the operation mode on the rear panel of the Unit to adjustment mode.
2. Set the voltage/current switch at the back of the terminal block.
3. Turn ON the power to the PLC.
4. Adjust the offset and gain.
5. Turn OFF the power to the PLC.
6. Change the setting of the operation mode switch on the rear panel of the
Unit back to normal mode.
Operation
1,2,3... 1. Turn ON the power to the PLC.
2. Ladder program
• Read conversion values or write set values by means of MOV(021)
and XFER(070).
• Start and stop conversion output.
• Specify the peak hold function.
• Obtain disconnection notifications and error codes.
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