6 Motion Instructions and G-Code Instructions
DVP-PM Application Manual
6-41
Mnemonic Function
M
M-code Instructions
Controllers
20PM -
Explanation
M0 ~ M65535
M102: End of O100 main program
M2: End of OX0 ~ OX99 motion subroutine
Explanations:
1. M-code instruction is one type of motion instruction. To execute M-code, first store the No. of M-code into D1703.
When M-code is enabled, M1794 will be “ON” automatically. If M1744 is set “ON”, M1794 will become “OFF”,
indicating that the execution of M-code is completed.
2. Y output can be enabled by executing M-code. The high byte of D1873 is used to enable Y output, and the low
byte is used to designate the start No. of Y output. When M1794 is “ON” (i.e. M-code is being executed), the Y
output terminals designated by D1873 will be “ON”. When M1794 is “OFF”, the Y output terminals will be “OFF”.
See Program Example 1.
3. M-code generally is used in the sections of OX00 ~ OX00 subroutines.
4. There are two modes for using M-code instruction: “after” mode and “with” mode. The difference between the
two modes is the timing of executing M-code instruction. See Program Example 2.
5. When the execution of M-code is completed, M1794 will turn from ON to OFF in two ways:
(1) Set M1794 to be “OFF” directly to reset the status.
(2) Set M1744 to be “ON” directly.
Note: There are two special M-codes exclusively for stopping O100 main program (M102) and OX0~OX99 motion
subroutine (M2). Users should avoid the 2 M-codes when applying M-codes for motion subroutines.
Program Example 1:
1. Display the current No. of M-code being executed, e.g. M6, by status of Y terminals:
(1) First set the parameter in D1873 as below:
MOV H0 D1873
□□ □
N: Start No. f Y output
O
0: Disable
1: Enable
(2) Execute M-code (M6). In this case, DVP-PM will automatically write K6 (0110) into D1703 (The executing M
code) and map the value in D1703 into K2Y
N
. N is the start No. of Y output.
MOV H6 D1703
MOV D1703
K2Y
N
When M-code is enabled, the above instructions will run automatically. Therefore, you do not need to enter
the two MOV instructions manually.
(3) The number of M-code (M6) will be displayed by Y outputs according to the settings of N value in D1873:
D1873 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
H00□□ No Y output
H0100 0 0 0 0 0 1 1 0
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