7I43 Spindle output

Hi all.

I'm using a 7I43 Messa board to control a milling machine. With some helps from you, now i have a three axis closed loop servo system machine, this is great, but i need an analogue output for spindle (open loop) and i have one free axis on 7I33 that i want to use it for analogue output. The problem is that i don't know how to configure it. I saw three methods for spindle control:
1.The simple way is to use 0_+-10 volt for speed and direction and a bit for enabling the drive.
2.Using 0_10 volts for speed and an enabling bit for drive and one bit for direction.
3.Using 0_10 volts for speed and one bit for enabling forward and another for enabling reverse.

I need second method for now but explaining all three methods would be very helpful in future.

I'll appreciate if you guide me how to manage this.

These codes are working for me:

loadrt abs count=1
addf abs.0 servo-thread
net spindle-speed motion.spindle-speed-out => abs.0.in
net spindle-speed-abs abs.0.out => hm2_7i43.0.pwmgen.03.value
setp hm2_7i43.0.pwmgen.03.scale 10000
net spindle-on hm2_7i43.0.pwmgen.03.enable
net spindle-on motion.spindle-on => hm2_7i43.0.gpio.042.out
setp hm2_7i43.0.gpio.042.is_output true
setp hm2_7i43.0.gpio.042.invert_output true
net spindle-reverse motion.spindle-reverse => hm2_7i43.0.gpio.043.out
setp hm2_7i43.0.gpio.043.is_output true
setp hm2_7i43.0.gpio.043.invert_output true

I found abs instruction in one of your last replies.
I got other methods too. Thanks for your help.

Motion.spindle-speed-out-abs

This pin is not present in my configuration, I faced with an error.

It's a very old version, 2.4.3.
Is there any way to upgrade it online, not installing from the beginning?

spindle speed pins are: speed-in, speed-out, speed-out-rps.

Yes, but, it depends a bit on what your operating system is based on. If your os is based on Ubuntu 10.04 (most likely) then an update to the current supported version of 2.7 is not difficult. If your os is something else then it is advisable to replace the os with the one on the current live CD and start fresh, but back up and save your machine configuration files as they can still be reused and save you from having to rebuild your config from scratch.
One more note about keeping Ubuntu 10.04, if you intend to update to Master (the development branch) or 2.8 when it is eventually released Ubuntu 10.04 will not be supported by those next versions.
linuxcnc.org/docs/html/getting-started/updating-linuxcnc.html
Minor modifications to your config files were required for 2.6 and 2.7, they are covered in the 2.6 and 2.7 documentation.