AMETEK 2120 PLC Interface Module - Manual (Page 41)

Installation and Programming Manual
Chapter 4: Programming
37
NOTE: After overriding either the upper or lower limit relays, the operator should move the
machine back into its normal operating range between its upper and lower limits. If the
machine is again moved in the wrong direction (towards the limits), the upper or lower
limit relays will again actuate. Step 1 - 3 will have to then be repeated.
4.5: Digital Outputs
If your system has been purchased with the optional digital output module, the following
programming sequence will be used to confi gure the board for compatibility with the PLC input
card. See pages 15 and 16 for wiring details.
Enter either
0, 1 or 2
200
Latch/Synchronize Handshake (201)
This function defi nes which of the two methods will be used to stabilize position data while
the PLC reads. The two options are Latch or Synchronize Handshake. Synchronize Handshake
tells the digital board to update on the transitional edge of a clocked square wave input (pin
24). Latch tells the digital board to update continuously until the latch input pin is activated by
driving it high, then the outputs will freeze. Data will immediately update to a current value
upon removal of the latch input.
NOTE: If set for Synchronize Handshake, the position data will never update if a square wave
input is not seen on pin 24. Allow a 100 microsecond settling time after each transition
before reading the output for both the Latch and Synchronize Handshake input.
1. Select the function key.
The monitor displays “F-----”
Output Type (200)
This function will set up the D25 connector on the digital board to output the current position
value in a Binary, BCD or Gray code format:
1. Select the function key.
The monitor displays “F-----”
2. Enter function 200. Select the enter key.
The monitor displays the function’s current value.
3. Enter either 0, 1 or 2.
0 = Binary (default)
1 = BCD
2 = Gray
Select the enter key.
(F)
(F)