Hardware core specifications
Processor: 80486DX2, 40MHz 32-bit processor, supports hardware floating-point operations
Total user memory: 240KB (shared by program+% R/% AI/% AQ registers, configurable allocation)
Scanning speed: 1K Boolean logic, typical 0.22ms, 90-30 series high-speed CPU
Backplane 5V consumption: 890   mA, power supply selection must account for this high power consumption
Built in serial port: 2-channel RS-232, 1-channel RS-485; Supports SNP/SNP-X, Modbus RTU master/slave, can directly perform serial Modbus without the need for CMM311 module
Battery: 3.6V lithium battery, backup RAM program, RTC real-time clock; Battery failure program lost
Working temperature: 0-60 ℃, IP20 inside the cabinet, does not support hot swapping
Latest firmware version: V10.50, programming software: Proficy Machine Edition (PME), VersaPro
IO and register resources
Discrete input% I: 2048 points
Discrete output% Q: 2048 points
Simulate% AI/% AQ: Allocated by 240KB of total memory
Register% R: Maximum configurable 16384 words
%Global bit: 1280 bits; %M internal coil: 4096 bits; %Temporary coil: 256bit; %S system status: 128 bit
Timer/Counter: 2000 sets
core functionality
High performance logic and floating-point operations
Support ladder diagram LD, FBD function block, SFC sequential function diagram, support floating-point PID operation, suitable for complex process projects.
Native multi-channel serial communication (significantly different from CPU331/341)
Equipped with multiple serial ports, native support for Modbus RTU master and slave stations; Can directly interface with third-party serial port instruments HMI， No need to purchase an additional CMM311 serial port module.
There is no Ethernet port on this machine; Ethernet requires the installation of IC693CMM321 communication module.
Large scale multi rack system management
Supports up to 7 expansion racks, CHS392/CHS398 local expansion, CHS393/CHS399 remote rack can be mixed and used, suitable for large-scale IO projects.
Rich expansion module compatibility
Supports advanced modules such as Genius bus (CMM301/302), Ethernet CMM321, Profibus DP master PBM200, etc.
RTC real-time clock, fault diagnosis LED, output forced, battery backup memory.

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