PLC (programmable logic controller/ China Manufacturer)CPU308

PLC CPU 308

Technical Specification

Performance Indexes

CPU308

K308-14AT

K308-40AR

K308-40AX

CPU

16-bit industrial

Execution Speed

Typical Bool instruction time: <0.5μS

Word operation time: <48μS

Arithmetic operation time for integers: <65μS

Arithmetic operation time for floating points: <150μS

DI Points

24XDC24V

DO Points

16XDC24V

16Xrelay

8XDC24V+12Xrelay

User Program Memory

FRAM, 32KB/about 4,000 steps

Program Backup

Permanent storage, without the need of battery

Memory Area

Variable storage area (V area): 4KB

System storage area (SM area): 300 bytes

Internal storage area (M area): 32 bytes

Data Retention Characteristic

Configure with the programming software: V area, C (counter) area

Retention Mode and Period

Adopt super capacitors and support a retention period of not less than 144 hours upon power failure under normal temperature.

Data Backup Characteristic

Perform backup operations VB3648~VB3902 according to user instructions, 255 bytes in total

Backup Mode and Time

FRAM, 255 bytes in total (writing operation for 10 billion times), permanent backup

Floating Points

Supported; the whole V area can be used for floating points

Programming Language Supported

Ladder Drawing (LD), Instruction List (IL)

Instruction Set

Basic instructions: 114; expansion instructions: 420

Password Protection

Yes

Max. I/O

Digital data: 280 in total (256 DI and 256 DO respectively);

Analog data: 60 in total (32 AI and 32 AO respectively)

Counter

256

Operation Mode of Counter

Addition, subtraction

Counter Range 

-32768~32767

Counting Value Retention Function

Yes

Timer

256

1 ms time base: 4

10 ms time base: 16

100 ms time base: 236

High-speed Counter

6 high-speed counters

where, single-phase counters: 6, with a maximum frequency of 30 KHz

where, dual-phase counters: 4, with a maximum frequency of 20 KHz

Pulse Output

2, PTO (Pulse Train Output)/PWM (Pulse Width Modulation output);

Maximum output frequency: 20 KHz

Analog Potentiometer

2, 10-bit resolution, values corresponding to internal registers

Interruption Function

Timing interruption: 2, 1ms resolution;

Timer interruption: T2/T3, 1ms resolution;

Edge interruption: 4, rising edge or falling edge optional;

High-speed interruption, communication interruption

Real-time Clock

Yes, with an error not greater than 2 minutes/month under a temperature of 25°C

The user can use the software to set/read: year, month, day, hour, minute, second, week. Standby batteries are used to supply power for the real-time clock upon power failure. Under normal temperature, the retention period of the real-time clock upon power failure is not less than 180 days.

Number of Connectable Expansion Modules

15; regardless of types

COM Port 

2, RS232 or RS485;

Supported working modes: Programming, Modbus-RTU (master/slave), Free protocol

Equipment Connected with COM Port

RS232/RS485: PC (for programming), third-party HMI panel, third-party serial communication equipment (for example, instruments, bar code reader, etc.)

Input Power Supply

AC85~265V

Sensor Load Power Supply

DC24V, max. 500 mA

Dimensions (L*W*H)

200X114X70mm