BUSKRO BK730-2, Руководство пользователя

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Chapter 2 BK730-2 Base Page 2-9
Figure 2-4:
The Base Control Board (p/n 9102380A)
The Base Control Board can be configured via the 6 DIP switches on DIP S1. These
switches are used to enable or disable communication of a CONVEYOR stop input signal
(switch S1-1), UPSTREAM stop input signal (S1-2), DOWNSTREAM stop input signal
(S1-3), JAM stop input signal (S1-4), CONTROLLER stop input signal (S1-5), and a
RUN signal which is passed on to upstream equipment (S1-6). These features can be
turned on or off at the customer’s discretion depending on how they want their system to
function. The DIP configuration switches allow the unit to eliminate the need for Stop
inputs in those machines and/or configurations where they may not be used. It is
important to note that any external STOP input can be disabled, the only one which cannot
be disabled is the front panel STOP switch.
A red “STOP INPUT” light on the board means that it is receiving a STOP input (i.e. the
input sees an open contact!). The machine cannot start and it will not send a START
signal to other equipment as long as it receives a STOP input. If there is a constant STOP
light, disable the 5 STOP inputs (S1-1 to S1-5) on the control board one by one until the
red light goes off; then you have found the input which is causing the stop condition.
The “Rule of Thumb” for the board is if a STOP input closure is not supplied (i.e. there is
no equipment to supply it), then the input must be disabled, otherwise it should be
enabled. Note that the five STOP Enable/Disable sections of the DIP switch will only
disable the STOP inputs and NOT the START inputs. The board is looking for a contact
closure for a START input and a contact opening for a STOP input. This is in keeping
with “fail-safe” philosophy which dictates that a disconnect or a power failure in any part
of the system results in the entire system stopping operation.
All START inputs need an open contact to close to activate a Start, while all STOP inputs
need a closed contact to open to trigger a stop condition. Thus, a lack of input for a start
means no start action, while the lack of a closed contact for a STOP input means that there
is a problem and the system should stop. Therefore non-existent STOP inputs must be
disabled for proper operation.
Buskro Ltd. BK730-2 Tabber