Cycle start/resume pause and external buttons problem (Mesa 7i76e card)

Hello guys,

I experience a weird thing in my LinuxCNC. When the machine is idle, the external cycle start buttons always activate itself while the pause/resume button will then wait for me to activate. The program is listed as in below 1).
The situation becomes worse when I added more external buttons. They are connected to the ports on two expansion connectors on Mesa 7i76e  card. They are controlled through the MDI commands. Those settings and HAL program are listed in below 2)
However, when I commented out those lines(marked #), the problem gone (that is it no longer happens), Can anybody help me to solve the problem

Thanks in advance

1) In custom file
#External Program Pause/Resume Button
net pause-resume-btn and2.0.in0 and2.1.in0 <= hm2_7i76e.0.7i76.0.0.input-09
net pause-on toggle2nist.0.is-on and2.0.in1 <= halui.program.is-paused
net run-on and2.1.in1  <= halui.program.is-running
net pause-sig or2.0.in0  <= and2.0.out
net resume-sig or2.0.in1 <= and2.1.out
net toggle-ok  toggle.0.in <= or2.0.out
net togglesig toggle2nist.0.in <= toggle.0.out
net toggleon halui.program.pause <= toggle2nist.0.on
net toggleoff halui.program.resume <= toggle2nist.0.off

#External Program Cycle Start Button
net cycle-start-btn and2.2.in0 <= hm2_7i76e.0.7i76.0.0.input-08
net idle-on and2.2.in1 <= halui.program.is-idle
net run-sig halui.mode.auto halui.program.run <= and2.2.out

net run-on => hm2_7i76e.0.7i76.0.0.output-00
net pause-on => hm2_7i76e.0.7i76.0.0.output-01

2) In config setting (.ini) file

[HALUI]
#MDI_COMMAND = M6T0
#MDI_COMMAND = M6T1
#MDI_COMMAND = M6T2
#MDI_COMMAND = M6T3
#MDI_COMMAND = M6T4
#MDI_COMMAND = M6T5
#MDI_COMMAND = M6T6
#MDI_COMMAND = custom command

In HAL file

# MID commands
#net toolchange-0 halui.mdi-command-00 <= hm2_7i76e.0.gpio.028.in 
#net toolchange-1 halui.mdi-command-01 <= hm2_7i76e.0.gpio.031.in
#net toolchange-2 halui.mdi-command-02 <= hm2_7i76e.0.gpio.043.in
#net toolchange-3 halui.mdi-command-03 <= hm2_7i76e.0.gpio.044.in
#net toolchange-4 halui.mdi-command-04 <= hm2_7i76e.0.gpio.045.in
#net toolchange-5 halui.mdi-command-05 <= hm2_7i76e.0.gpio.046.in
#net toolchange-6 halui.mdi-command-06 <= hm2_7i76e.0.gpio.048.in
 

Can you explain more about what 'activates it's self' means?
It means you are doing some fancy things here please explain how ut is supposed to work.

That is I haven't touch anything on the machine, the cycle start button will turn on (and its lamp lids) by itself, sometimes some axis will travel a short distance as well, so it is dangerous, even in some cases, the tool collide with workpiece and broke.

Please explain what your code is supposed to do.

Part 1, is external cycle start and resume/pause buttons
Part 2, they are a small portion of the programs for the added seven external buttons, they are for the selection of 7 tools for tool changing operations

1. I would trace the signals with halshow or halscope to see what is happening (noise triggering cycle start?)

2. I would never use raw expansion port pins for switch inputs without at the minimum some
EMI filtering/protection.

Here are three attachments for the hallscope captured 4 signals (start button input pin..input-00, idle-on, run-on and run-sig)  when the machine starts itself: 

So at a quick glance it looks like that this is unrelated to the 7I76E signals and just
an issue with the logic.

(you might check at a lower time per division to make sure you are not missing a
~1 servo cycle glitch)

Here is an attachment for the photo of the probed 8 signal for :
 run-on
 hm2_7i76e.0.gpio.028.in
 hm2_7i76e.0.gpio.031.in
 hm2_7i76e.0.gpio.043.in
 hm2_7i76e.0.gpio.044.in
 hm2_7i76e.0.gpio.045.in
 hm2_7i76e.0.gpio.046.in
 hm2_7i76e.0.gpio.048.in