US 9,811,486 B2
Programmable controller
Tomo Ikuyama, Tokyo (JP); and Junji Yamamoto, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 14/899,584
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jun. 25, 2013, PCT No. PCT/JP2013/067403
§ 371(c)(1), (2) Date Dec. 18, 2015,
PCT Pub. No. WO2014/207825, PCT Pub. Date Dec. 31, 2014.
Prior Publication US 2016/0147682 A1, May 26, 2016
Int. Cl. G06F 13/42 (2006.01); G06F 1/12 (2006.01); G06F 13/362 (2006.01); G05B 19/05 (2006.01)
CPC G06F 13/362 (2013.01) [G05B 19/05 (2013.01); G06F 13/4278 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A programmable controller comprising:
a bus for data transmission and reception;
a synchronous-control signal line that transmits a synchronous control signal;
a synchronous-control-signal generating unit that is connected to the synchronous-control signal line and generates the synchronous control signal whose period changes such that a frequency is proportional to a speed of movement of a moving workpiece, on a basis of a variable pulse signal from an encoder measuring a position of the workpiece;
a counter unit that is connected to the bus and the synchronous-control signal line and latches, in a first internal memory, a count value obtained by counting a pulse, number of which is proportional to an amount of movement of the workpiece, on a basis of the pulse signal from the encoder at a timing synchronized with the synchronous control signal;
an analog input unit that is connected to the bus and the synchronous-control signal line and latches, in a second internal memory, an analog signal that is a measurement result of a sensor measuring a thickness of the moving workpiece at a timing synchronized with the synchronous control signal; and
a CPU unit that is connected to the bus and the synchronous-control signal line and reads a value in the first and second internal memories via the bus in synchronization with the synchronous control signal.