VR70 and VR71 config

[odewdney]

When you set the VR7x configuration in your VRCxxx it sets up the VR7x so it knows which inputs are VR10 or VR11 etc, and which relays control mixer valves:

VR70

Request: 10 52 b523 (9) Data: 00

sensor: 0=VR10,1=VR11,2=demand
relay: 1=mixer

cfg  r3 r5 s1 s2 s3 s4 s5 s6 
  1: 00 01 00 02 02 00 00 00 : ma-r3/4 s6->r5/6
  2: 00 01 00 00 02 00 00 00 : ma
  3: 00 01 00 00 00 00 00 00 : ma-r1 s6->r5/6
  4: 00 00 00 00 00 00 00 00 : --
  5: 01 01 00 02 02 00 00 00 : -- s5->r3/4 s6->r5/6
  6: 00 00 00 00 00 00 01 00 : ma-r3/4
  7: 00 00 00 00 00 00 00 00 : ma
  8: 00 00 00 00 00 00 00 00 : ma
  9: 00 00 00 00 00 00 00 00 : --
 10: 00 00 00 00 00 00 00 00 : --
 11: 00 00 00 00 00 00 00 00 : --
 12: 00 01 00 00 00 00 01 00 : -- s6->r5/6

VR71

Req: 10 26 b523 (11) Data: 04

sensor: 0=VR10,1=VR11,2=demand,3=PWM

                 ss ss ss ss ss ss
                 12 34 56 78 91 11
cfg                           0 12
  1: 01 01 00 00 00 00 01 02 00 03
  2: 01 01 01 00 00 00 01 00 00 03
  3: 01 01 00 00 00 20 22 00 00 00
  6: 01 01 01 00 00 00 00 22 02 00

I am not sure about the first 4 bytes in the VR71 config - it looks like they should be mixer control, but config-3 has 3 mixer zones, and i guess the 4th byte is unused, as the "R13" connection in the VR71 seem to be not an output at all.

this was using info from
https://professional.vaillant.co.uk/downloads/product-manuals/vrc-700/vrc-700-installation-instructions-1968307.pdf
page 33