How to implement the Trigger for PCE-L122(3)-DCO in the MyLink tool
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