Step 9: Determining Number Of Plc Units; Plc Standard Configuration - Mitsubishi Electric G-50A Technical Manual

12. Step 9: Determining Number of PLC Units

This chapter talks about how to determine the number of sequencers (PLC).

12.1 PLC Standard Configuration

G-50A uses PLC (Programmable Logic controller) to provide measuring instrument charging function
(pulse count system), general-purpose control function and other functions. The PLC to be used is
"MELSEC-Q series" by Mitsubishi Electric, and Figure 12-1 shows the standard configuration of G-50A
system.
In the standard configuration, "power supply unit", "CPU Unit", "Ethernet Unit" are mounted in the slots
above the base unit.
Two open slots should be mounted with boards (DC input unit and transistor output unit) necessary to
realize various functions. Model names of MELSEC-Q series products are listed in the Table 12-1 below.
Name
Sequencer CPU unit
MELSEC-Q series
Power supply unit
Ethernet unit
Base unit
DC input unit
(extension)
Transistor output unit
(extension)
78
Power supply unit
Figure 12-1 PLC standard composition
Table 12-1 MELSEC-Q series name and model name
Type of unit Model names (Makers)
Q02CPU (Mitsubishi Electric)
Q61P-A1 (Mitsubishi Electric)
Q71E71-100 (Mitsubishi Electric)
Q33B (Mitsubishi Electric)
QX40 (Mitsubishi Electric)
QY40P (Mitsubishi Electric)
CPU unit
Ethernet Unit
Open port 1
Open port 2
Base unit
Mandatory
Software needed to perform various functions
(ATA card should be inserted.)
Mandatory
AC100V only (Select Q61P-A2 for a single-phase
200V application.)
Mandatory
Mandatory
One unit can accommodate 16 contact input.
This is non-voltage input.
One unit can accommodate 16 contact input.
This is non-voltage output.
Detail