HBM PMX Manuel D'emploi page 158

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What must I watch out for when connecting the PMX to a PC?

The Ethernet cable must be plugged in. Both nodes (PMX (factory setting
DHCP) and PC) must be set to DHCP. The connection is established by
entering "PMX" in the browser bar.
What must I watch out for when replacing the plug-in cards?

The PMX must be de-energized! When you switch on, all the cards are
automatically detected. Any new cards that are added have to be
parameterized.
How can I synchronize several PMX?

By connecting with standard Ethernet cables using the SYNC sockets. The
first PMX is automatically configured as the master, all the others are
automatically slaves. There are 20 PMX devices that can be networked.
How many measurement channels are available?

A PMX can be fitted with a fieldbus card and max. 4 measurement cards. 4
measurement channels are possible for each measurement card, i.e. a
total of 16 measurement channels.
How many computing channels are available?

There are always 32 computing channels available in the basic device for
each PMX. This allows a wide variety of regulation and control tasks to be
processed in the PMX using anything from peak-value calculation to PID
control, and relieves the burden on downstream systems and PLCs.
How high are sampling and calculating rates in the PMX?

All channels, measurement channels and computing channels, are
sampled and calculated with 19200 Hz. This means that extremely fast
measurement data processing and automation are possible. The
measuring bandwidths can be taken from the specifications of the
individual measurement cards.
How high is the resolution and accuracy of the PMX?

The measurement channels have 24-bit resolution. This allows even very
small signals in the partial-load range to be measured accurately and
reliably. The accuracy class is at least 0.1%.
Can the channels of adjacent PMX devices be offset?

No. Only the measurement and computing channels of the individual PMX
can be processed, not those of the other connected devices.
Can the PMX also be used as a fieldbus master?

No. Each PMX works as a slave in the fieldbus network.
Where can I find the latest firmware and device description files?

The current versions of the firmware/PMX web server and the device
description files can be downloaded at
www.hbm.com/support
Troubleshooting
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