Title: +038=360.000-OU045T_03-PCD2.m4160 PLS SBC - Hardware Manual.pdf
Input filtersSC x1 x2ModeInputsABOperating principleThis can be largely derived from the block diagram. It is only necessary to add some explanation about the counter output circuit:The output of the internal counter is identified as “Counter Flag”. The user has no hardware access to it. This counter flag is set to “1” whenever the counter is loaded or by means of a separate instruction.The flag is set to “0” in up-counting mode:in down-counting mode:when counter value 65,535 is reached when counter value 0 is reachedTo reset a CCO hardware output which had previously been set high by the user pro- gram, it is necessary to differentiate between two cases:a) count range between 0...65,535 (normal case) b) count range exceeding 65,535Case a): output.Resetting the counter flag results in a simultaneous reset of the CCO050'000Counter FlagReset EnableCCOThe “Reset-Enable” should be activated before the counter reaches zero.