These are basic information about the counter instructions and the plc itself.
High speed counter plc.
A common use for a highs speed counter is an encoder that one would use in application to measure or monitor speed usually of a motor and or for positioning.
Different types of high speed counters can be used simultaneously but their high speed counter.
High speed counter module user s manual qd62 qd62e qd62d gx configurator ct sw0d5c qctu e a 1 a 1 safety precautions read these precautions before using this product before using this product please read this manual and the relevant manuals carefully and pay full.
These 21 counters are all 32 bit up down counters see table 3 7.
The 21 point high speed counters c235 to c255 share the eight high speed counter input terminals x0 to x7 of the plc and one input terminal can only be used for one high speed counter at the same time.
The input can count up down up down pulse direction or quadrature with z.
The hsc command is used for counting where timed instances are very short and a regular ctu or ctd will not do.
Best way to learn about high speed counter is to download an application example from siemens site and have a look at it there are plenty of them.
Up counter ctu down counter ctd up down counter ctud basics of counting in a plc.
Maximum speed on the high speed counter inputs are 100 khz.
Basics of counting in a plc.
There are seven 7 different modes of operation for the high speed counter available so adaption to your automation solution is easy.
The hsc instruction is enabled when the rung logic is true and disabled when the rung logic is false.