Chapter 3 Function List - Mitsubishi Electric MELSEC iQ-R Series User Manual

3
FUNCTION LIST
The following shows the function list of the D/A converter module. For details on the functions, refer to the following.
 MELSEC iQ-R High Speed Digital-Analog Converter Module User's Manual (Application)
Item
Range switching function
D/A conversion enable/disable setting function
D/A output enable/disable setting function
Analog output HOLD/CLEAR function
Analog output test function when the CPU module is
in STOP status
Scaling function
Shift function
Warning output function
Rate control function
External power supply interruption detection function
Disconnection detection function
Interrupt function
Wave output function
Inter-module synchronization function
Error history function
Event history function
Offset/gain setting
Backing up, saving, and restoring offset/gain values
Online module change
Firmware update function
*1 The firmware update function cannot be used for the module in offset/gain setting mode.
Precautions
Check that output from the D/A converter module is stopped before performing the firmware update function. Performing the
firmware update function without stopping the output may cause unintended operation of the module, resulting in failure of the
system.
3 FUNCTION LIST
20
Description
Allows switching the output range of an analog output for each channel. Switching the range makes it
possible to change the I/O conversion characteristics.
Controls whether to enable or disable the D/A conversion for each channel. Disabling the D/A
conversion on unused channels reduces the D/A conversion cycles.
Specifies whether to output the D/A conversion value or offset value for each channel. The conversion
cycle is constant regardless of whether the output is enabled/disabled.
Controls whether to HOLD or CLEAR the analog output value output when the operation status of the
CPU module is RUN, STOP, or stop error.
Carries out the analog output test when the CPU module is in STOP status.
Performs scale conversion on digital values within a specified range between a scaling upper limit value
and a scaling lower limit value. This function reduces the time and effort to create a program of the
scale conversion.
Adds the shift amount of the specified input value to the digital value.
Outputs a warning in the event the digital value exceeds the warning output upper limit or is lower than
the warning output lower limit.
Prevents sudden changes in the analog output value by controlling the amount of increase or decrease
of the analog output value per conversion cycle.
Detects when the external power supply 24VDC is not supplied or the supply is stopped.
Detects disconnections by monitoring the analog output value.
Executes an interrupt program of the CPU module when an interrupt factor such as a disconnection or
warning output is detected.
Registering prepared wave data (digital value) in the D/A converter module enables continuous analog
output in the specified conversion cycle.
Synchronizes the operation of multiple D/A converter modules and the D/A conversion timing of all
channels.
Records up to the 16 errors and alarms that occurred in the D/A converter module to store them into the
buffer memory areas.
Collects the errors and alarms that occurred and the operations executed in the D/A converter module
as event information into the CPU module.
Corrects errors in the D/A conversion value for each channel.
Makes it possible to back up, save, and restore the offset/gain values of the user range.
Allows module replacement without stopping the system. For the procedure of the online module
change, refer to the following.
 MELSEC iQ-R Online Module Change Manual
*1
Enables users to update the firmware versions of modules by using firmware update files. (For the
firmware update file, please consult your local Mitsubishi representative.) For details on this function,
refer to the following.
 MELSEC iQ-R Module Configuration Manual