Programmable controller having a drum type sequencer function subject to programming

Claim 1

A programmable controller, including a memory for storing a user program, comprising: counter means freely controlled by said user program; a status memory which can be be freely read in a unit of at least one bit in accordance with said user program; a set value table in which data showing numeric range is stored in an area corresponding to each bit of said status memory; input means for writing data in said numeric range into said set value table; comparison means which when a command related to said counter means in the user program is executed, successively compares a counted value of said counter means with data of each numeric range in said set value table to judge whether or not said counted value is within the stored numeric range; and status update means for determining the logic of each bit of said status memory corresponding to data in each numeric range in accordance with the result of the judgement of said comparison means.