P
RO
V
U
™ PD6310-WM NTEP Certified Pulse Input Batch Controller
Instruction Manual
39
Sample Relay Operation
The sampling function allows the operator to set a set
point for a “sampling” relay. This can be done for the
rate, total, or grand total. Each time the relay reaches
the set point, it will close that relay’s contacts for a
programmed period set by the user.
A rate sampling relay will activate for the sample time
(
sanm t
), every time the set point rate is reached.
A total sampling relay will activate for the sample time
(
sanm t
), every time the process has batched the
amount programmed for the set point (See the
diagrams on page 37 more details). The utility of this
function can, of course, be expanded beyond
sampling and be used whenever a timed relay output
closure is required after the batch total interval
reaches a certain set point.
Setting Up the Interlock Relay
(Force On) Feature
Relays 1-4 can be set up as interlock relays. To set
up the relays for the interlock feature:
1. Access the
Setup
–
Relay
–
Action
menu and set
the action to off.
2. In the Advanced features
–
User
menu program
any of the digital inputs to Force On any of the
internal relays (1-4).
3. Connect a switch or dry contact between the +5V
terminal and the corresponding digital input (dI-1
to dI-4) terminal.
Interlock Relay Operation Example
Relays 3 & 4 are configured to energize (their front
panel LEDs are steady on) when SW1 & SW2
switches (above) are closed. If the contacts to these
digital inputs are opened, the corresponding front
panel LEDs flash indicating this condition. The
processes being controlled by the interlock relay will
stop, and will re-start only after the interlock relay is
re-activated by the digital inputs (switches).
Note: If multiple digital inputs are assigned to the
same relay, then the corresponding logic is (AND)
–
i.e. both switches must be closed to activate the relay.
1
2
3
4
5
6
+5
I1
I2
I3
I4
O1
7
8
O2
O3
9
10
O4
G
DI 1-4
DO 1-4
5 VDC
GND
SW2
SW1
