Retrofitting a 1986 Maho MH400E
Glemigobles wrote: Do I measure it with ground on TB1 (like I would power on TB1)? If so, an enabled empty output pin reads 0V.
Yes measure from TB1.8 ( note you should remove the I/O connector to measure 7I84
outputs as the screw does not reliably contact the output pin unless tightened )
As you can see I chained the 204 to both the two field power connectors on the 7i84.
One issue I has was that my 28A1 Relay panel had a bad contact on that bottom row of connectors. I had random failures where the MESA boards wouldn't power up. I traced it to the green terminal block at the bottom of the board which has the terminal 204 connection. Pulled, cleaned the contact and re-seated it, and haven't had any issues with that since.
That can't be your issue though, as that should take done both 7i77 and 7i84. I think you have a config issue with your 7i84. Can you see it's I/O pins in the HALshow? If you put you voltmeter on outpin pins and command a state change, can you see the switch in voltage?
Mark, because to a large extent I don't really understand what I'm doing. I thought you took that 24V power from the disconnected pendant terminal block, and since I thought I wanted to keep it I decided I'd just buy a second PSU. I have very little wiring experience and wasn't sure how to connect to these buses (also b/c I can't read these diagrams very well).
Glemigobles wrote: Okay, I took off the connector, set output 15 to true and measured it against TB1-8. It reads 0V. This is using just halcmd, with loardrt hostmot2, then loardrt hm2_pci.
That will not work as a test, you need to launch LinuxCNC and then run halcmd
( This means you may need to unlink the pin first )
To have the card output 24V power through 7i74's port 5, can it be set to:
sserial_port_1=00000000? or should it be sserial_port_1=00001000?
EDIT: answered my own question, it doesn't change anything for the measurement.