How to get the value from encoder 15S-20M8 via 1769-IF8 module?

[wendaiyu 0]

Hi, guys, how r u? We have a small project to control a blade up and down. After the configuration on 1768-L43, we downloaded the program and DIs and DOs are functional. We plan to use an encoder (part number: 15S-20M8-0360NV1R3PP-J00-S1) to monitor the height of the blade, so we connected it to 1769-IF8 module. But no matter how to rotate it, this is no value change on 1769-IF8 channels. Could somebody tell us how to figure it out? Thanks a lot.

[b_carlton 61]

As noted on the plctalk forum the module is an analog input but the encoder provides two digital signals best read by a high speed counter input.