Mesa 7i96S, SSR output not work
- japiii
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09 May 2026 10:43 #346282
by japiii
Mesa 7i96S, SSR output not work was created by japiii
I have spindle CW and CCW signals connected to out-04 and out-05. Both works fine.
I want control spindle water cooling with relay and Mesa output. I have connected relay to PB3 pins 13 and 14. When I try to control the relay, nothing happens and Mesa output led not switch on.
I bought cnc router used, so I'm not sure, what Mesa configuration I have. I have read Mesa's pinout and it shows HOSTMOT2 and I can find line
TB3-13,14 11 IOPort SSR 0 Out-00 (Out)
If I try to control output by command "halcmd setp hm2_7i96s.0.ssr.00.out-00 true" and read state by command "halcmd show pin hm2_7i96s.0.ssr.00.out-00" state changed from false to true. Still, output led not lights up and relay not change the state.
I'm totally stucked with this and have no idea what could be wrong.
I want control spindle water cooling with relay and Mesa output. I have connected relay to PB3 pins 13 and 14. When I try to control the relay, nothing happens and Mesa output led not switch on.
I bought cnc router used, so I'm not sure, what Mesa configuration I have. I have read Mesa's pinout and it shows HOSTMOT2 and I can find line
TB3-13,14 11 IOPort SSR 0 Out-00 (Out)
If I try to control output by command "halcmd setp hm2_7i96s.0.ssr.00.out-00 true" and read state by command "halcmd show pin hm2_7i96s.0.ssr.00.out-00" state changed from false to true. Still, output led not lights up and relay not change the state.
I'm totally stucked with this and have no idea what could be wrong.
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- PCW
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09 May 2026 13:51 #346284
by PCW
Replied by PCW on topic Mesa 7i96S, SSR output not work
If LinuxCNC is running and you have no watchdog bite (red LED on 7I96S)
and halcmd setp hm2_7i96s.0.ssr.00.out-00 true does not activate SSR0's LED,
Then its likely that the 7I96S has been damaged.
Do any SSR outputs work?
and halcmd setp hm2_7i96s.0.ssr.00.out-00 true does not activate SSR0's LED,
Then its likely that the 7I96S has been damaged.
Do any SSR outputs work?
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09 May 2026 16:17 #346292
by japiii
Replied by japiii on topic Mesa 7i96S, SSR output not work
No, none of them work. So it seems, that I can't get my water pump to work with Mesa.
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09 May 2026 16:31 - 09 May 2026 16:35 #346293
by PCW
Replied by PCW on topic Mesa 7i96S, SSR output not work
If none of them work, the card has likely been damaged, possibly by
driving an inductive load with no flyback diode, or a problem with the
5V supply.
Likely damaged components are U9 (74ACT540) and possible 1 or more
MOSFETs (Q1,Q2,Q3,Q5 = PMN55ENE or equiv)
Also just to make sure that it's not a homemade firmware issue, you might
re-write the firmware to the default 7I96S firmware:
mesaflash --device 7I96S --addr 10.10.10.10 --write 7i96s_d.bin --reload
(replace 10.10.10.10 with 192.168.1.121 if your card is jumpered that way)
driving an inductive load with no flyback diode, or a problem with the
5V supply.
Likely damaged components are U9 (74ACT540) and possible 1 or more
MOSFETs (Q1,Q2,Q3,Q5 = PMN55ENE or equiv)
Also just to make sure that it's not a homemade firmware issue, you might
re-write the firmware to the default 7I96S firmware:
mesaflash --device 7I96S --addr 10.10.10.10 --write 7i96s_d.bin --reload
(replace 10.10.10.10 with 192.168.1.121 if your card is jumpered that way)
Last edit: 09 May 2026 16:35 by PCW.
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