Modicon X80 IO Platform Page 3-30 I/O modules

3/30 Functions (continued) Modicon X80 I/O platform BMXEHC0200/0800 counter modules Operating modes for module BMXEHC0800 5 configurable 16-bit modes Frequency meter This mode measures a frequency, speed, rate, or data stream control. As standard, this mode measures the frequency received on the IN A input. This frequency is expressed in Hz (number of pulses per second), with a precision of 1 Hz. The maximum frequency on the IN A input is 10 kHz. The maximum cyclic ratio at 10 kHz is 60%. Event counting This mode is used to determine the number of events received. In this mode, the counter calculates the number of pulses applied to the IN_A input at time intervals defined by the user. As an option, it is possible to use the IN_AUX input during a period of time, provided that the enable bit has been configured. The module counts the pulses applied to the IN_A input each time the pulse for this input lasts longer than 50 s (without anti-bounce filter). Pulses with less than 100 ms synchronization are lost. Downcounting This mode is used to list a group of operations. In this mode, when counting is enabled (software validation via the valid_sync command), a rising or falling edge on the IN_AUX input causes a value, defined by the user, to be loaded in the counter. The latter decreases with each pulse applied to the IN_A input until it reaches the value 0. Downcounting is made possible when the force_enable command is high (software positioning). The smallest pulse applied to the IN_AUX input varies according to the selected filter level. The maximum frequency applied to the IN_AUX input is 1 pulse every 25 ms. Loop (modulo) counting This mode is used in packaging and labelling applications where actions are repeated on sets of moving objects. The counter increases with each pulse applied to the IN_A input until it reaches the user- defined modulo - 1 value. On the next pulse in the upcounting direction, the counter is reset to 0 and upcounting restarts. The maximum frequency applied to the IN_A input is 10 kHz. The smallest pulse applied to the IN_AUX input varies according to the selected filter level. The maximum frequency of the modulo event is 1 event every 25 ms. The maximum modulo value is 65,536 units. Up/down counter This mode is used for an accumulation, upcounting, or downcounting operation on a single input. Each pulse applied to the IN_A input produces: b Upcounting of pulses if the IN_AUX input is high b Downcounting of pulses if the IN_AUX input is low The counter values vary between the limits - 65,536 and + 65,535. The maximum frequency applied to the IN_A input is 10 kHz. Pulses applied to the IN_A input after a change of direction are only upcounted or downcounted after a period corresponding to the delay for taking account of the state of the IN_AUX input due to the programmable filter level on this input. One 32-bit mode 32-bit counter counting 32-bit counter counting mode is available for channels 0, 2, 4, and 6 (channels 1, 3, 5, and 7 are now inactive). It behaves in the same way as the up/down counting mode using up to 3 physical inputs. It enables simultaneous upcounting and downcounting. The counter values vary between the limits - 2,147,483,648 and + 2,147,483,647 (31 bits + sign). The maximum frequency applied to the IN_A and IN_B inputs is 10 kHz. The smallest pulse applied to the IN_AUX input is defined according to the filtering applied to this input. The maximum frequency of loading the preset value is 1 every 25 ms. Compatibility: page 1/6 Racks and power supply modules: page 2/2 Communication: page 4/8 Ruggedized modules: page 5/2 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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