Process Control Instructions - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

2.7

Process Control Instructions

When a process control program is created, using process control function blocks is recommended.
Process control function blocks have features as follows.
• A process control program can be easily created by placing and connecting FB elements.
• Since the initial value of the function block can be set in the "FB Property" window of the engineering tool,
the program for the initial value setting is not required.
• An operation constant can be input to a label indicating a tag name without being conscious of address of a
device.
• The operating status of a tag FB can be checked and controlled by accessing the tag data from the
faceplate of an engineering tool.
For details on the process control function blocks, refer to the following.
 MELSEC iQ-R Programming Manual (Process Control Function Blocks)
I/O control instructions
■Analog input processing
Instruction symbol
S.IN
■Output processing 1 with mode switching
Instruction symbol
S.OUT1
■Output processing 2 with mode switching
Instruction symbol
S.OUT2
■Manual output
Instruction symbol
S.MOUT
■Time proportioning
Instruction symbol
S.DUTY
■Batch counter
Instruction symbol
S.BC
■Pulse integration
Instruction symbol
S.PSUM
2 CPU MODULE INSTRUCTIONS
122
2.7 Process Control Instructions
Processing details
Performs following processing to the input data (PV): range check, input limiter, engineering value
transformation, and digital filter.
Processing details
Calculates MV (0 to 100%) from the input data (MV), and performs the variation rate & upper/
lower limiter processing and output conversion processing.
Processing details
Performs variation rate & upper/lower limiter processing and output conversion processing to the
input data (MV).
Processing details
Reads the manipulated value (MV) from the loop tag memory and performs output conversion.
Processing details
Outputs ON and OFF by changing the ON/OFF ratio in a given cycle in proportion to the input data
(0 to 100%).
Processing details
Compares the input data with the set value, and outputs bit data when it reaches the set value.
Processing details
Integrates the number of input pulses, and outputs the operation result.
Reference
Page 1197 S.IN
Reference
Page 1203 S.OUT1
Reference
Page 1209 S.OUT2
Reference
Page 1214 S.MOUT
Reference
Page 1217 S.DUTY
Reference
Page 1223 S.BC
Reference
Page 1227 S.PSUM