PPC905AE101 3BHE014070R0101 control module

The safety function of the processor module includes the following points: ƒ Processing the user programs. - If faults occur: Stop the user program and reset the variables to the initial values - If faults occur: Reset the processor module to the safe state and report the CPU status ƒ Safe communication between HIMA controllers (HIMax, HIMatrix, and remote I/O modules) using the safety-related safeethernet protocol. Data is transferred using either the Ethernet interfaces of the processor module itself or using the Ethernet interfaces of a COM module. The safety function is performed in accordance with SIL 3. The following elements also contribute to achieving the safety function: ƒ Hardware self-tests ƒ Safe communication with the I/O modules

The module must be installed on a suitable connector board to be able to operate. The connector board is described in Chapter 3.6. An Ethernet cable is required to connect to the PADT. Connector boards and Ethernet cables are not included within the scope of delivery of the module.

Reaction in the Event of a Fault

 If the test harness detects faults, the processor module enters the ERROR STOP state and restarts itself. The fault cause can be investigated using the diagnostic information. Start after an Error Stop If the cause of the fault is still present, the processor module avoids restarting and repeating the error stop: ƒ After a first error stop, the processor module restarts normally and switches to its system operation. ƒ After the second error stop, the user must restart the system using the PADT after eliminating the problem. ƒ Once the processor module has run in system operation for approximately one minute, the next error stop to occur is considered to be as first error stop

Structure 

The processor module is a plug-in module that is inserted into a base plate and supplied with electric power. Functional units of the module: ƒ Safety-related processor system 1oo2 ƒ System controller ƒ Ethernet switch ƒ Memory ƒ Mode switch, see Chapter 3.4.18. ƒ Indicators, see Chapter 3.4.11. 3.4.1 Block Diagram, Functional Units The following block diagram illustrates the structure of the module.

Safety-Related Processor System

 The safety-related processor module is a 1oo2 processor system. Continuous self-tests ensure safety-related operation. Characteristics: ƒ Two synchronous microprocessors ƒ Specific DDRAM memory for each microprocessor ƒ Testable hardware comparator for data buses ƒ Watchdog (WD) ƒ Gold capacitor for buffering date/time ƒ LEDs for indicating the system statuses ƒ Mode switch for configuring the module behavior when voltage is switched on The processor module compares the data on both processors and triggers an interrupt if a fault occurs. A watchdog monitors both processors. Self-tests of the module also check the watchdog.

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