Mitsubishi PLC FX1S Specification Remarks Operation control method Cyclic operation by stored program I/O control method Batch processing method (when END instruction is executed) I/O refresh instruction is available Operation processing time Basic instructions: 0.55 to 0.7 ms Applied instructions: 1.65 to several 100 ms Programming language Relay symbolic language + step ladder Step ladder can be used to produce an SFC style program Program capacity 2K steps Provided by built in EEPROM memory Number of instructions Basic sequence instructions: 29 Step ladder instructions: 2 Applied instructions: 85 A Maximum 116 applied instructions are available including all variations I/O configuration Max total I/O set by Main Processing Unit General 384 points M0 to M383 Latched 128 points (subset) M384 to M511 Special 256 points From the range M8000 to M8255 General 128 points S0 to S127 Initial 10 points (subset) S0 to S9