34
This means that once the first batch has been delivered (started by normal means),
the batch counter will stop for the timeout period and then automatically reset and
start another batch, and another, and another; until the process is stopped by the
operator, or by a stop input, or when the cycle counter reaches its setpoint value.
Normally the cycle counter will be used just to count the number of batches that have
been delivered. The value of 0 in block b4 covers this function. If the batch counter
autorecycle feature is enabled in block b3, the cycle counter will stop the batch
counter from autorecycling when the number of batches delivered is equal to the
cycle preset by programming a value of 1 into b4. The final variation on the
autorecycling theme occurs when b4 is set to 2. This causes the cycle counter to
reset itself when the cycle setpoint is reached. Furthermore, if output 2 is programmed
as a timed cycle setpoint output (block r3 = 80), the batcher will wait the timeout
period and then automatically restart delivery of another cycle setpoint worth of
batches. This will continue until the process is stopped by the operator, or by a stop
input.
Column C - Communications
Block Parameter Range
C1 Serial Address 00 - 99
C2 Baud Rate 0 1200
1 2400
2 4800
3 9600
4 19200
C3 Parity 0 None
1 Odd
2 Even
RS 485 is an industrial communications format that allows multiple units to be
connected to a single communication line. Up to 100 units may be on the line, but
each must have a unique address entered in block C1.
Each character in the serial command string consists of ten bits. The first bit is a
start bit that is followed by seven data bits (ASCII), one parity bit, and finally, one stop
bit. The serial protocol used by the Eclipse uses string checksum error detection
and does not use parity error detection, but the parity bit must always be sent. The
Eclipse will include the parity bit in its response, either as even, odd, or no parity
(space).
PROGRAMMING cont.
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