I have a M-91-2-R1 and I am having trouble with the HSI. I think I have tried every combination of setting to get the MI to count. I currently have the 0,1 input set to High speed Shaft Encoder (X2). When hooked up the encoder will not change the MI. If I just use a jumper wire the MI will change to 1 but when I remove the jumper the value goes back to 0. I believe the encoder to be good, if I use a multimeter the encoder registers mA and volts. Any help would be appreciated. Thanks.