CPC MultiFlex PAK, Руководство пользователя

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8 • MultiFlex I/O Board Operator’s Guide 026-1712 Rev 3 03-JAN-2008
NOTE: The MultiFlex PAK may only be
numbered up to 16, since E2 will only speak to
a maximum of 16 PAK boards. A PAK num-
bered above 16 will be ignored.
3.2.2. Setting the Baud Rate
All I/O boards have dip switches that deter-
mine the baud rate at which they communicate.
Currently, the baud rate dip switch in network
components may be set at either 9600 or 19200
baud. Either may be used -- refer to your site
controller’s user manual for the baud rate recom-
mendation (currently 9600 baud for both
REFLECS and E2 controllers).
On all MultiFlex boards, switches 6 and 7 on
S3 are used to set the baud rate. To communicate
at 9600 baud, set switch #6 UP and #7 DOWN.
For 19200 baud, set switch #6 DOWN and #7
UP. Refer to
Figure 3-2 for a visual look at how
the switches must be set.
3.2.3. Setting the Terminating Re-
sistance Jumpers
All MultiFlex boards and other RS485
devices have a set of terminating resistance
jumpers (one jumper for each wire lead). These
jumpers are labeled JP2, JP3, and JP4 on the
MultiFlex board.
The purpose of the jumpers is to indicate the
two ends, or termination points, of the segment.
On a daisy chain, one device at the beginning
and one device on the end must be terminated.
On the MultiFlex, this is done by placing all
three termination jumpers in the OUT (toward
the left edge of the board) position. To untermi-
nate a MultiFlex, these jumpers must be set to
the IN (toward the center of the board) position.
Figure 3-3 shows the termination jumper set-
tings for all MultiFlex boards.
Figure 3-2 - 16 Network ID and Baud Rate Switches
Figure 3-3 - I/O Network Termination Jumper Settings