Productivity Series Frequently Asked Questions
Question
How do I create a "follower" or "slave" function/application with the P3-HSI and HSO modules?
Answer
Very easily! There are 2 main ways to do this: using both an HSI and an HSO module, OR, just using an HSO module with another signal source (analog perhaps).1)With HSI and HSO module: In Hardware Config for the HSI module, when you get to "Channel x Setup", the tag you create for the entry "Current Velocity" ("MyMasterVelocity" for example)will be the incoming master velocity signal. This will be the tag used in the VMOV instruction in the ladder.Continue with the HSI and HSO configuration, compile and save your project.
Now, in the ladder, use the VMOV box, and in the Velocity entry, use the tag from above "MyMasterVelocity" and fill out the rest of the entries in the box. When enabled, assuming the Scaling of HSI and HSO are even, the VMOV will output pulses in direct relation to the value of "MyMasterVelocity".
2)If just using an HSO module, setup the module in Hardware Config, compile and save project. Again, the VMOV box will be used, and the master velocity signal ( analog, calculated, external comms, etc) will be the tag used in "Velocity" of the VMOV box. You will need to match up the ratio between the two, either using the Scaling setup of the HSO, and/or a SCALE instruction in the ladder for your master signal.
FAQ Subcategory: High-speed count / Pulse out
This item was last updated on 2012-04-26
Document ID: 1398
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