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Quantum safety architectures - Modicon Quantum Automation Platform Page 6-22

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Modicon Quantum automation platform

Safety CPUs

Memory structure


Specific operating modes

(continued) Maintenance mode The Quantum safety PLC Maintenance mode is a temporary mode which is useful for modifying the project, debugging and maintaining the application program. It provides the following functions: b Changes can be downloaded b Safety variables can be assigned and forced: limited to EBOOL variables b It is possible to switch to safety mode while forcing is in progress

Memory structure

The application memory is divided into memory areas, physically distributed in the internal RAM memory and on 1 PCMCIA memory expansion card. 1 The application data area is always in the internal RAM. It consists of global located data, corresponding to the data defined by an address (for example %MW237) with which a symbol can be associated. 2 Application program and symbols area in the internal RAM or in the PCMCIA memory card (descriptor, executable code for the tasks and application symbols database) 3 Constants area in the internal RAM or the PCMCIA memory card (constant words, initial values and configuration) Depending on the requirements for application memory size, there are two possible ways to organize the memory according to whether or not the Quantum safety CPU is equipped with a PCMCIA memory expansion card: b Application in the internal RAM, the application is entirely loaded in the internal RAM which is backed up (1) by the CPU (2 MB). b Application in the PCMCIA card, the internal RAM is reserved for the application data. The PCMCIA memory card contains the program space (program, symbols and constants areas). The presence of the symbols area with the program area is optional. The fact of having the application symbols database on the PLC means that, when it is connected to an empty programming PC (with no applications), all the elements needed to debug or upgrade this PLC are available. Protecting the application Whether located in the internal RAM or in the PCMCIA card, the application can be protected with a key switch (see page 6/20) in order to prohibit its access (read or modify program) online under Unity Pro XL Safety. PCMIA cards for safety CPUs

Type Program size KB Data size KB Reference SRAM+FLASH 2048 1024 TSXMCPC002M SRAM+FLASH 512 TSXMCPC512K FLASH 1024 TSXMFPP001M FLASH 2048 TSXMFPP002M FLASH 4096 TSXMFPP004M FLASH 512 TSXMFPP512K SRAM 1024 832 TSXMRPC001M SRAM 2048 1856 TSXMRPC002M SRAM 3072 2880 TSXMRPC003M SRAM 7168 6976 TSXMRPC007M SRAM 1792 1600 TSXMRPC01M7 SRAM 768 576 TSXMRPC768K (1) The internal RAM memory is backed up by a 3 V


lithium battery. CPUs: page 1/2 I/O architectures: page 2/6 I/O: page 3/2 Communication: page 5/2

2 3 1

Available internal RAM PCMCIA card (in slot A) Located data CPU with PCMCIA memory card in slot A

768 to 7168 KB

Program and symbols Constants

768 KB or 1 MB

1 2 3

Available internal RAM

768 KB or 1 MB

Located data Program and symbols Constants Operating system CPU without PCMCIA memory card

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