How to implement the Trigger for PCE-L122(3)-DCO in the MyLink tool
Explanation: The Motionnet master cards PCE-L122-DCO and PCE-L123-DCO have a CN4 interface (highlighted in the right image). This interface serves several functions:
– Encoder input interfaces: x2
– Counting functionality
– Source for CMP comparisons
– CMP trigger out: x2
– Position comparison trigger output functionality
– Dynamic camera imaging
– DI: x4, NPN-Sink mode
– General-purpose digital inputs
– LTC (Linear Time Code) functionality
– DO: x4, NPN-Sink mode
Pin assignment definitions for the adapter board: (Please refer to section 1.3.5 in the manual)
Label | Function | Description |
01 | EA+_1 | 1st encoder A phase (+) |
02 | EB+_1 | 1st encoder B phase (+) |
03 | EA+_2 | 2nd encoder A phase (+) |
04 | EB+_2 | 2nd encoder B phase (+) |
05 | CMP_1 | 1st compare output |
06 | DI_1 | 1st digital input and 1st latch input |
07 | DI_3 | 3rd digital input and 3rd latch input |
08 | DO1 | 1st digital output and 1st signal generator |
09 | DO_3 | 3rd digital output |
10 | EGND | External Ground |
11 | EA-_1 | 1st encoder A phase (-) |
12 | EB-_1 | 1st encoder B phase (-) |
13 | EA-_2 | 2nd encoder A phase (-) |
14 | EB-_2 | 2nd encoder B phase (-) |
15 | CMP_2 | 2nd compare output |
16 | DI_2 | 2nd digital input and 2nd latch input |
17 | DI_4 | 4th digital input and 4th latch input |
18 | DO_2 | 2nd digital output and 2nd signal generator |
19 | DO_4 | 4th digital output |
20 | E24V | External 24V DC |
Wiring examples for implementing Trigger functionality
Settings and operational steps on the MyLink tool
1.Click directly on the PCE-L122-DCO’s box
2.Configure the following parameters:
– Start_Position_0(1):
– Set the starting point for the CMP Trigger
– Interval_0(1):
– Define the interval between trigger pulses
– Dir_0(1)
– Specify the triggering direction, whether it’s in the positive or negative direction
– Width_0(1)
– Set the trigger output width
– Size_0(1)
– Determine the number of triggers
– Level_0(1)
– Set the trigger to be a rising or falling edge trigger
– Encoder Mode:
– Define the mode for the Encoder
– A/B phase
– CW/CCW
3.Click on Start_Trigger0(1) → A green light will appear, indicating that it’s waiting for the Encoder input
– Encoder: There will be value input (as shown in the red box on the right)
– Auto Compare: Values will be generated until the specified Size count is reached, at which point it will stop.
Abnormal Phenomena and Troubleshooting Methods
- Abnormal Reading of Encoder
– Please verify if the Encoder Mode setting matches the actual signal input
– If the Encoder values are reversed, swap the A/B wiring connections
– If there are missing Encoder values, check the cable connections. It’s recommended to use twisted pair cables to avoid signal interference
– Confirm the signal source for accurate output
- Abnormal Auto Compare Values
– Missing Encoder values
– Encoder direction is opposite to the configured direction
