Precision Digital PD6830 - Manual (Page 14)

PD6830 Pulse Input Rate/Totalizer Instruction Manual
14
PULSE OUTPUT K-
FACTOR (COUNT)
K-factor (couNT) programmable from 0.000001 to 9999999.
Rate pulses are generated as a scaled output of the rate input
with one output pulse per K-factor (count) number of input
pulses. Total and grand total pulses are generated for every
total or grand total increment selected. (e.g. K-factor value of
100 will generate one pulse every time the total is incremented
by 100 units)
Rate retransmission pulses one to one for input pulses, up to
maximum output speed. K-factor is not used for retransmitting
outputs.
PULSE OUTPUT
PULSE WIDTH
Unless otherwise stated, pulses are 50% duty cycle for re-
quired frequency.
A pulse rate retransmit output will generate 100 to 130 μs
pulses at the falling edge of every input pulse.
PULSE OUTPUT
MAXIMUM
FREQUENCY
5 kHz, pulse width at 50% duty cycle.
If the programming of the outputs would exceed 5 kHz, the
meter will display pUlse OVERRNG
QUADRATURE
OUTPUT
Output set to quadrature will lag the other pulse output by 90°
(1/4 duty cycle) at output frequency. Minimum 1 Hz
TIMER OUTPUT
Programmable on and off time, repeating cycle. Minimum pe-
riod 0.1 second, maximum 100,000 seconds. Minimum pulse
time 0.01 second, maximum 10,000 seconds.
Serial Communications
PROTOCOL
2-Wire RS-485 Modbus® RTU
METER AD-
DRESS/SLAVE ID
1 - 247
BAUD RATE
1,200; 4,800; 9,600; 19,200; 38,400; 57,600;
or 115,200 bps
TRANSMIT TIME
DELAY
Programmable between 0 and 199 ms
PARITY/STOP BIT
Even, odd, none with 1 stop bit, or none with 2 stop bits
BYTE-TO-BYTE
TIMEOUT
Max of 1.5 character times or 750 μs
Note: Refer to Modbus Register Tables at www.predig.com for details.