Maple Systems Silver HMI504T, Инструкция по установке и эксплуатации

Страница: 74 / 272

Any CF Type1 flash card may be used that has been formatted for the FAT format, and has a memory size equal to
or greater than 64MB.
4
To store the file from the PC to the Compact Flash Card:
1. Open ImageCF.exe (located in the EZware folder). The following screen will appear.
2. Press the magnifying glass to browse for your project’s .eob file. Press open, and
ImageCF.exe automatically converts the *.eob file to an “ImageCF.bin” file which will create
itself in your EZware directory.
3. Copy the ImageCF.bin file to the Compact Flash card. (Using Windows Explorer, drag the
ImageCF.bin onto your Compact Flash Reader device.)
4. Insert the Compact Flash card into an OIT.
5. Find the Dip Switches on the back of the OIT. Set Dip Switch 2 “On,” then push the Reset
button (or cycle power). The OIT will show some text and at the bottom right side of the
screen a green button will appear. Press the green button and the OIT will load the project
from the Compact Flash Card and automatically reboot to application mode.
š
Dip Switch 2 on the back of the OIT should be moved back to the “Off” position after
the project has downloaded.
Con nect ing Mul ti ple OITs to one PLC
Most of the PLCs on the market communicate to OITs using a master/slave format. The PLC typically behaves as
the slave responding to requests from the OIT for data and not initiating any communications. Therefore, the OIT
must continuously poll the PLC for data needed. Some of the PLC protocols do not allow multiple master devices
(OITs) to connect to the PLC. If you want to connect two or more OITs to a PLC, you often need to purchase
multiple communications modules for the PLC, which can be very expensive.
To address this need, the Silver Series has a built-in feature which allows multiple OITs to connect together in a
daisy-chain fashion. One of the OITs is designated as the ‘master’ while the other OITs are defined as ‘slaves’. The
master OIT is directly connected to the PLC communications port. Each slave OIT then communicates through the
master OIT to get data from the PLC.
No additional communications modules are required. This feature provides an effective and inexpensive way to
connect multiple OITs to a single PLC.
Hard ware Con nec tion
As stated above, the OITs are connected in a daisy-chain fashion using RS232 communications. This means that
you can have a maximum of 50 feet distance between OITs. Also, because connection uses a daisy-chain method, if
1010-1001a, Rev 02
70 Sil ver Se ries In stal la tion & Op er a tion Man ual