Mesa 7i96S SSERIAL and pktuart

Hallo,
I have used in my machine Mesa 7i96S -> 7i74 -> 7i87 I have flashed 7i96s_7i74d.bin and everything works. But I also need to control the driver for tin pump motor (will be used as spindle) Driver is controlled with something like modbus. So, my idea was to use serial port on 7i96S Unfortunatelly, in HALshow I see there sserial port only and not pktuart. I have tried to flash 7i96sd_pktv2.bin but then 7i74 and 7i87 doesn't work. Is it possible to have 7i74 connected to 7i96s 's P1 and use serial port on TB2 as pktuart?
Thanx a lot for your help.

That may be quite a project, but I can add a PKTUart
to either the last channel of the 7I74 or the local port
on the 7I96S

Thanx for answer! I am changing control system in my selective soldering machine Inertec ELS 3.0 Machine is not bad, but original control system is horrible, LinuxCNC and Mesa will move the machine to 21.century
Well, it doesn't matter where pktuart will be, but I think, 7i96s local port will be better.

7I96S configuration with PKTUART on the 7I96s and 7I74
(all sserial) on P1. Note that the P1 sserial  port changed to
to port 0 (was port 1)

 
 

Waw, you are really super fast! Thanx a lot, I will test it!
Thank you very much.

I have flashed new software, changed sserial to 0 in HAL and it works. I have compiled and installed mesa_modbus with halcompile and loaded it in HAL. It seems it also works fine, I see modbus in HALshow. Great! But I don't know how to start modbus communication? Checked with oscilloscope, no communication on RS485. Can you help me what I am doing wrongly? Thanx.