HIMA HIMax Safety Related Controller System

Power redundancy: The system supports connecting two redundant 24 VDC power supplies, which are respectively connected to L1+/L1- and L2+/L2- terminal blocks. Each module supports decoupling of two power sources internally.

Programming and Variable Management

4.1 Programming System

The HIMax system uses the SILworX programming tool to create user programs on personal computers. The user program consists of functional blocks that comply with the IEC 61131-3 standard, user-defined functional blocks, as well as variables and connections. A controller can load up to 32 user programs and can set priorities for simultaneous processing.

4.2 Variables and System Parameters

Variable types: Supports multiple types such as local variables, global variables, input/output variables, etc., and can assign safe initial values to any variable. When the source of the variable's value from the physical input or communication interface fails, the variable will adopt this initial value to ensure a safe state.

System variables and parameters: System variables are predefined and used to handle the properties or states of the HIMax system in user programs. System parameters are used to configure the behavior of the controller, such as safety time, watchdog time, automatic start, mandatory permission, and other key parameters. These parameters are configured in the detailed view of SILworX's resource properties dialog box or hardware editor.

4.3 Mandatory Function

Forcing is the process of replacing the current value of a variable with a forced value, used to test user programs or simulate unavailable sensors. Mandatory can run at two levels: global (all applications) or local (individual user program). Time limit can be set, and the force will automatically stop after timeout. The use of mandatory functions requires the consent of the organization responsible for acceptance testing, and additional technical and organizational measures must be taken to ensure process safety.

Diagnosis and Event Recording

5.1 LED indicator light

The front panel of the HIMax module provides rich LED indicator lights, divided into multiple groups such as module status, redundancy status, system bus status, rack connection status, slot status, fault status, maintenance status, I/O status, fieldbus status, Ethernet status, and communication status, providing intuitive information for rapid on-site diagnosis.

5.2 Diagnostic History Record

Each HIMax module maintains a diagnostic history that stores faults or other events that occur in chronological order. The diagnostic history is divided into short-term diagnosis and long-term diagnosis, and the storage capacity varies depending on the module type (for example, X-CPU 01 can store 2500 long-term events and 1500 short-term events). SILworX can read, mix, filter, and save these historical records, providing a basis for in-depth analysis of problems.

5.3 Alarm and Event Sequence Recording

The HIMax system is capable of recording alarm and event sequences. An event is a factory or controller status change with a timestamp, and an alarm is an event indicating an increase in risk level.

Boolean event: The state change of a Boolean variable (such as a numerical input) can be arbitrarily assigned between alarm and normal states.

Scalar event: Exceeding the limit defined for scalar variables (such as INT, REAL), two upper limits and two lower limits can be set.

Events can be created by processor modules or specific I/O modules and stored in non-volatile buffers (with a capacity of 5000 events), which are then read by X-OPC servers and transmitted to third-party systems for evaluation or display.

Installation and maintenance

6.1 Environmental and Grounding Requirements

Environment: Operating temperature 0 to 60 ° C, storage temperature -40 to+85 ° C, pollution level II, altitude<2000 m, protection level IP20.

Grounding: The system can operate with floating or L-grounding. The grounding resistance should be ≤ 2 Ω. The control cabinet must use large-area functional grounding connections to ensure electromagnetic compatibility.

6.2 I/O connection method

HIMax provides flexible on-site wiring solutions to meet different application requirements:

Direct connection: Use a single or redundant connection board with screw terminals to directly connect sensors/actuators.

Through FTA connection: Use on-site terminal assembly board and connect to the connection board through system cables. This method facilitates the separation of on-site wiring from the controller, such as installation in a separate wiring cabinet.

6.3 Heat dissipation considerations

Due to the high integration of electronic components, heat dissipation is crucial. The system must be installed on a suitable fan rack above the base plate to ensure ventilation. All unused slots must be inserted with empty modules to ensure airflow channels. The heat dissipation of the control cabinet needs to be calculated based on power consumption, effective surface area, and installation type.

6.4 Startup steps

The first time starting the HIMax system, strict steps need to be followed, including setting the IP address and SRS of the system bus module through the MAC address, setting the "responsible" system bus module, setting the IP address and SRS of the processor module, interconnecting the backplane, logging into the system, loading projects, and starting.