JPT YDFLP-E-20-M7-S-R User Manual page 16

22 Enable
 Pulse width control instruction
 Send instruction to Pin2 of DB25 connector and send clock signal to Pin3 at the
same time. The instruction description will be transmitted in binary form, with its most
significant bit transmitted first.
 The instruction structure transmitted by the user to the laser is as follows:
0xA5
 0xA5 (A5h) is the active pulse width control byte. 0xA5 and all subsequent data
bytes are input to Pin2 serial input.
 Data length of input laser is 4-bit bytes.
 The first byte of instruction code is 0x01.
 The Pin22 signal needs to be turned on 10us in advance before sending Pin2 and
Pin3 signals. After finished pulse width adjustment, Pin2 and Pin3 signals need ≥10us delay
before turning off Pin22 signal (as shown in Figure 14).
 All instruction design starts with byte 0xA5.
 Set Pin19 low before using pulse width control function.
 Pulse width control instruction code
Table 10 Pulse Width Control Instruction Code
Instruction
Set-up pulse width
It takes less than 50ns to finish the fiber laser pulse width initialization.
Remarks: If Instruction code transmit 3 * 0x01 instruction, it will not be accepted by the laser.
 Pulse width time sequence
 The following figure is an example to illustrate the sampling series diagram with a
pulse width of 200ns. The series of 0x01 bytes of instructions is as follows:
Example: 0xa5 → 0x01 → 0x00 → 0xc8
0xa5: for activating pulse width control instruction
0x01: for setting pulse width instruction
0x00 and 0xc8: set the pulse width to 200ns.
Pulse width control function:
High: Enable, Pin2 and Pin3 to control the pulse width
Low or Not connection: Disable
Instruction Code
Instruction Code
0x01
15
YDFLP-E-20/30-M7 User Manual
Description
Set-up pulse width（ns）
File Number: J-SI-0036