Communication With Pc - Parr Instrument 4838 Operating Instructions Manual

4838 Reactor Controller

Communication with PC

The 4838 Controller is provided with RS-485 port
(labeled comm) and may be connected to a USB
port on a PC with optional A1925E4 communication
cable.
Quick Start Instructions for Connecting with PC
1. Put the 552M CD into the CD-ROM.
2. Connect the A1925E4 communication cable
between the comm port on the back of the 4838
Controller and an open USB slot on the PC.
3. The PC should open an "Install Hardware" wizard
automatically when the cable is connected to the
USB slot. If it does not, go to the Control Panel
and select "Add Hardware" to start the wizard.
4. When prompted, check the box to search re-
movable media for the proper driver. The wiz-
ard should fi nd the driver on the 552M CD and
install the USB driver. It may prompt that the
driver has not been validated; select "continue
anyway" to continue the installation. After this
it may repeat the installation process for the RS-
485 converter.
5. Copy the controller software to the PC. The soft-
ware is located on the CD at: "software
exe" .
6. Once copied to the PC, open the
fi le. No installation is necessary.
7. At the main _ Com program screen, select _ _
"protocol >> set PC". Ensure that the following
values are set:
Baud: 9600
Data length: 8
Parity: even
Stop bit: 1
ASCII: RTU
16
Click OK to return to the main screen.
8. At the main screen, select "Program >> Monitor".
The Monitor screen will come up. There will be
a generic icon on the left, and four mini screens
_ \ Com. _ _
on the right. Each mini screen can be used to
connect to a different module on the 4838 Con-
troller.
_ Com.exe _ _
9. In the fi rst mini screen, select 1 for the Address,
and click Connect. It should connect to the
Primary Temperature module on the 4838 Con-
troller, and the bottom half of the screen should
show parameters for the controller. These may
be modifi ed here. Of most interest will be the
"Input >> SV" value, which is the setpoint for
temperature. Also, the "Alarm >> Alarm 3" value
will show the High Limit alarm for this module.
10. Any other modules on the 4838 Controller may
be accessed through the remaining available
mini screens. A pressure display module will
typically be address 3 and an HTM/ETLM will be
adress 4.