C-1
Appendix C. Monitoring Sampler Status
via RS-485
When controlling a sampler via time-based/stand-alone or pulse control, it is
possible to still collect the sampler status values over RS-485 (PakBus® or
Modbus®). The following sections walk through configuring the MD485 to
talk with a CR1000 and then programming examples for Modbus® and
PakBus® in
CRBasic
.
C.1 Configuring an MD485
1. Connect a serial cable to the RS-232 port on the MD485 and to the
computer.
2. Supply power (12 Vdc) to the MD485 by the power jack or through the
+12 V line on the CS I/O connector. You will need a SC12 serial cable to
connect the CS I/O port of the MD485 to the CS I/O port on the
datalogger.
3. Open
DevConfig
. Click
Peripheral
. Select
MD485
. Select the
Communication Port
. Push the
Program
button on the MD485. Click
Connect
. The program button is located to the right of the RS-485
connectors on the modem’s front panel.
FIGURE C-1. MD485 Device Configuration screen
Summary of Contents for PVS5120 Series
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