Carlisle Ransburg DynaFlow 77376, Руководство по обслуживанию, Страница: 23 / 96

System I/O
JOB Select
Inputs
JOB Strobe
Input
System Ready/
Halt Input
Global GUN
Enable
These inputs are used to select a JOB number from the external PLC or other host controller. These
inputs represent Binary Coded Decimal (BCD) that translates to 3 digits, each digit represented
as a 4-bit binary code. The JOB Select inputs are used in conjunction with the GUN Mask inputs
to determine which GUNs will accept the JOB number represented by the total of the active JOB
Select Bits. See "Operation" section of this manual for details. These signals must be asserted
prior to the JOB Strobe Input and held on slightly after the strobe signal goes low.
JOB Strobe requires a pulsed signal of at least 0.25 seconds duration. This signal is used in
conjunction with the GUN MASK inputs and program select inputs to activate a new JOB # for any
or all GUNs. When the controller detects this input, the program select inputs and GUN MASK
inputs are read and action taken to load the new JOB # in the JOB # QUEUE. The new program
select and GUN MASK inputs must be present before the PROGRAM SET STROBE is activated.
Reference "Job Selection Timing Diagram Sample" in the "Operation" section.
System Ready/Halt is a maintained signal that permits activation of any or all GUNs. For the
controller to operate, this signal must be maintained in the high state (24 VDC). When this signal
is active, the system Ready/Halt output will be held ON.
If the signal is lost, ALL GUNs will stop and the READY output is turned OFF. The GUNs must be
restarted in the normal manner when this signal is again activated. The JOB # QUEUE for any
GUN is not effected by the state of this input.
The Global GUN Enable is a maintained signal that overrides all of the individual External Fault/
Enable GUN inputs. Reference "GUN INPUTS". This is most useful when using RIO, RS-485, or
RS-232C control and the discrete GUN I/O is not used through J3, J4, J5, or J6 of the mother board.
System Pulse
Output
System Fault
System Spare
The System Pulse output can be used as a watchdog function by a PLC or other external controller
to determine if the flow controller is operating normally. The output is a 50% duty cycle, 0.5 HZ
signal (2 pulses per second).
A high signal on this output indicates that a system, GUN or other fault has occurred. The type
of fault that causes this output to activate is selectable by the Horn Code located in the System
Configuration table.
Not used presently.
INTERFACING TO THE FLOW CONTROLLER
Description
SYSTEM INPUTS
Input Signals
Description
SYSTEM OUTPUTS
Output Signals
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INSTALLATION