Maple Systems OIT Family - Manual (Page 66)

MRR–Bit Position
(OIT3100 and OIT4100 Series only)
When a bit position MRR is used, the PLC requests a screen by setting a bit instead of
writing a number. Each bit in the specified MRR address corresponds to one of 16 stored
screens in the OIT. To access more than 16 of the OIT’s 500 stored screens, you must
configure multiple bit position MRRs. Up to 40 can be configured.
NOTE:Only one MRR is polled every 200 milliseconds. Therefore, if two MRRs are
configured, it takes 400 milliseconds to poll them.
To determine which stored screen to display, the OIT examines each bit in the polled
MRR and then displays the stored screen that corresponds to the first set bit.
Configuring the MRR
(all models except OIT3100 and OIT4100 Series)
1. From the Configuration menu, choose Message Control Settings. The OIT Message
Control Settings dialog box appears.
2. In the Message Request Register group box, in the scroll box, specify the PLC
address for the MRR.
3. In the MRR/CMR Data Format group box, specify the data format for the MRR and
CMR.
4. Choose the Done button to return to the OITware-200 main screen.
Displaying Stored Screens 66
1010-0099, Rev. 07