Mitutoyo MIG-USB Multiplexers
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part/characteristic to use the gage on port #3, so it will send out a request for a reading from port #3. This allows
users to have only 1 footswitch and dynamically read the input required for the characteristic being measured.
Method 2:
When programmed for Signal Trigger the interface can accept a PRE-REQUEST for data. This feature will allow
software on the PC to send a request for the input required before the trigger port is activated. When the trigger
port is active, the PRE-REQUESTED input is immediately sent to the PC.
This allows software to request the part/characteristic required for the next reading. After each data event, the
PRE-REQUEST is cleared. If multiple requests are received, only the last request for data is valid. If two or more
commands are issued, only the last received command is executed when the trigger port is activated.
If no PRE-REQUESTS are received, the interface will send the word FOOTSWITCH or REQUEST in the reading
field. Standard output format: 0001,FOOTSWITCH, ,01<CR><LF> (Data trigger on port #1)
Note: See Appendix: Host Commands - Signal Trigger for additional notes and details.
- Selective Trigger –Great for Fixture Gaging: Allows users to collect readings from multiple inputs simultaneously via
a single data request. Users can configure any trigger port to trigger readings for up to 10 ports at a time. When
triggered, the selected ports will send data to the PC in the order selected. The data request will take place
simultaneously for all ports.
To configure, you simply enter the port numbers required, separating them by a comma. (i.e. P01,P02,P04)
This is great for fixture gaging measuring parts with multiple-gaged characteristics. A common use for this feature is
when there is a two position fixture for a part. Each position reads certain features using a unique combination of
devices. Trigger port 1 is programmed for a set of gages. Trigger port 2 is programmed for another set of gages
(gages can be in both groups). When the part is in one position, readings are sent and then the part is moved or
rotated to another position and another series of readings are taken. Each position will have all the required
measurements taken at the same time and sent to the PC.
- Step Trigger: This feature allows users to select a data collection sequence. The interface will step through the
sequence of ports - one gage input/output per data request - each time you activate the trigger port. This feature can
be used to step through a measurement sequence on a part, taking readings from the port required as the part is
measured.
To configure, simply enter the port numbers required, in the sequence required, with a comma to separate them. For
example: P01,P06,P04. The first use of the trigger port will take a reading on gage input port 1, the next trigger will
take a reading on port 6, and then the next on port number 4. You can select any sequence of ports to be read for up
to 10 ports per trigger input.
Caution for Step Trigger Use: Step trigger is a sequence of events. The software and hardware need to be
setup to collect in the same order. If a data send trigger is sent by accident or a reading needs to be re-taken, the
sequence of readings will become out of sync and lose their continuity. To re-start the sequence, reset the
interface or cycle through to the beginning.
This feature should be used with some software checks to verify that the sequences of data sending and
receiving are at the same point. The best use of this feature is on a fixture where controlling the speed of data
sending is the goal. We strongly recommend the Signal Trigger feature as the preferred solution.
- Timed request: This feature allows the MIG-USB multiplexer to become part of an automated system for monitoring
a process. The MIG-USB will automatically request a reading based on a 24 hour timer (HH:MM:SS). This is helpful
in monitoring process variables such as temperature, humidity or any other variable that requires periodic
measurements.
Note: In addition to the above data sending options, the transfer (flow) of data to the computer can be controlled.
As part of the Options Menu for each input, there is a setting for Gage Response. Readings can be buffered
and stored inside the MIG-USB or can be transferred immediately to PC.
