HCMCO3-1A B & R Automation
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The B & R Automation HCMCO3-1A is part of the HCM Maestro PLC Modules series and operates with a 33 MHz clock frequency. It features 2 MByte DRAM with a 32-bit width, 512 KByte SRAM, and a 1 MByte FPROM. This module includes RS232/TTY and RS232/RS485 serial interfaces, and supports a memory management unit.
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Product Description:
The HCMCO3-1A central processor belongs to the HCM Maestro PLC Modules series from B&R Automation. It slots into the Maestro backplane and functions as the primary logic engine in an industrial controller, interpreting ladder logic, structured text, or compiled code to drive actuators and read sensors. By coordinating sequencing, motion, and data-handling routines, the module links higher-level supervisory software with field I/O so automated equipment maintains precise timing and interlock integrity on fast production lines.
Processing speed is governed by a clock of 33 MHz, allowing deterministic scan cycles for motion and safety tasks. Volatile program storage uses 2 MByte of DRAM on a 32-bit data path, so the CPU retrieves operands and instructions in aligned double-word transfers. For variables that change every millisecond, the controller keeps them in 512 KByte of SRAM, avoiding repeated flash writes and guaranteeing retention during brief power dips through battery backup. A dedicated Memory Management Unit enforces page boundaries, isolating each task’s stack and heap when multiple user applications coexist under hard real-time deadlines.
Permanent system code and user boot code reside in 1 MByte of FPROM, so the module powers up consistently after maintenance or extended outages. At startup, it loads the OS-9/68030 real-time operating system, supplying preemptive multitasking and POSIX-style services tailored to the 68k instruction set. Communication with external devices is handled through a dedicated programming port rated for RS232/TTY signaling and a selectable network port supporting RS232/RS485 half-duplex wiring, and both channels allow baud-rate adjustment from the setup menu. Because no PCMCIA interface is present, expansions such as additional Ethernet or memory cards must be attached through separate bus modules.
Frequently Asked Questions about HCMCO3-1A:
Q: What is the clock frequency of the HCMCO3-1A PLC module?
A: The HCMCO3-1A operates at a clock frequency of 33 MHz, providing reliable processing power for automation tasks.
Q: How much DRAM does the HCMCO3-1A have and what is its width?
A: This model has 2 MByte of DRAM with a width of 32 bits, allowing efficient memory operations and quick data access.
Q: What is the capacity of FPROM in the HCMCO3-1A PLC module?
A: A 1 MByte FPROM is included in the HCMCO3-1A for non-volatile storage of important system data.
Q: What serial interfaces are available on the HCMCO3-1A PLC module?
A: The HCMCO3-1A is equipped with RS232/TTY and RS232/RS485 serial interfaces for versatile communication options.
Q: Which operating system does the HCMCO3-1A PLC module utilize?
A: This module runs the OS-9/68030 operating system, tailored for real-time industrial applications.
