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Page 42
DFS-1 Manual Revised 7/95
POWERTEC Ind. Corp.©
3. SET PARAMETER #3 TO SELECT WHICH
FUNCTIONS ARE REMOTE.
This parameter may be used to include or exclude
control functions from local control and assign them
to the remote link. The setup of this parameter has
nothing to do with assigning functions to input
terminals! This parameter ONLY AFFECTS
WHETHER THE CONTROL OF THE
FUNCTION IS LOCAL OR REMOTE.
4. SET PARAMETER #4 TO SELECT THE
COMMUNICATIONS PROTOCOL.
This parameter selects the POWERTEC binary
protocol.
5. SET PARAMETER #56 FOR
COMMUNICATIONS TURN AROUND
DELAY.
Set parameter #56 to default to 2 though it may
have to be set to 6 or 8 for most reliable
communications with Allen Bradley devices.
4.5 COMMUNICATIONS SETUP
The local operator's panel operates at CPU level
and does not require the setup of any
communications parameters. The following setup
is for an external communications link.
Before connecting to the external communications
link, the following parameters must be set properly.
The other parameters may be set after the link is
established.
The default parameters set up the DFS-1 as follows:
• the unit has an address of 001
• the baud rate is 9600
• The unit is in local mode
• using a binary communications protocol
1. SET PARAMETER #1 FOR
COMMUNICATIONS NETWORK ADDRESS.
This is the address which the DFS-1 will respond
to on the external comm link. Since the default is
001, it might be a good idea to start the network
addresses at 002 so that a unit being replaced does
not cause an addressing conflict.
Addresses up to 255 are valid, but the RS-485
protocol only allows for 32 units on a single line
without repeaters.
2. SET PARAMETER #2 FOR
COMMUNICATIONS NETWORK SPEED.
This is the communications rate at which the DFS-
1 will operate on an external comm link. Rates
range from 300 baud to 38.4 Kilobaud (see page
16).