Honeywell's DCS systems are widely used in the petrochemical industry, with two main product lines: the TDC3000 series and the TPS series. While both series share the same control station hardware structure, their operator stations and supporting software differ significantly. The TPS series operator station is called the GUS operator station. The GUS operator station uses dedicated models from Dell or Motorola, equipped with Honeywell's dedicated keyboard and network interface cards, and runs Honeywell's integrated software. If the operator station malfunctions, purchasing hardware from Honeywell requires bundling the GUS operator station software package, resulting in a lengthy and expensive process, incurring unnecessary costs for users. Therefore, replacing the GUS operator station with an industrial PC capable of installing GUS station operating software significantly facilitates the maintenance of the TPS series DCS and saves users repair costs. 1. Hardware Configuration Industrial PC Configuration: Intel PIV 2.4GHz CPU, 40GB SCSI interface hard drive, 256MB (DDR) memory, PCA-6113P4R motherboard, integrated graphics card (PCA-6006) on a dedicated PCI expansion card, integrated network card model DFE 530TX with ISA slot, optional ZIP drive. Note: For Z-type Console workstations, in addition to the essential LCNP board, an integrated keyboard interface card (IKB12) is also required as the GUS host. 2. Operating System Installation The operating system selected is English Windows NT 4.0. When installing on a large hard drive, pay attention to compatibility issues, otherwise, system crashes and other problems may occur. The following two methods can be adopted: 1) First, create only a 2GB primary partition on the large hard drive, leaving the remaining space untouched. After the NT system is installed, immediately install the SP6.0 patch, restart the machine, and then use a partitioning tool to allocate the remaining space. 2) Install a dual operating system: First, install WIN98 on the C drive, then install Windows NT4.0 on the D drive. Since the installed GUS workstation software requires the partition to be in NTFS format (this can be achieved by selecting the "Format partition with NTFS" option during system installation), and NTFS is incompatible with FAT32, it is recommended to select FAT format (no more than 2GB) when installing WIN98. During the system installation process, be sure to select to install the network card. Failure to install it or an unsuccessful installation will prevent the flowchart screen from opening later. The general practice is to first select the "Microsoft loopback" option in the system list, and then replace it with the actual network card driver after the system installation is complete. 3) GUS Software Installation When installing the software, pay attention to version consistency, especially the LCN version number and Display Builder version number. During installation, first insert the "GUS TPN Software" CD to load the GUS properties, then insert the "TPS System Software" CD to load the GUS components. After restarting the machine, configure the LCNP board properties to GUS. The path is: Start > Program > Honeywell TPS > ADD Board. The LCN node address and name settings are: Start > Program > Honeywell TPS2 > Configuration Utility. 4. Install the Integrated Operator Keyboard (IKB) . Currently, GUS operator stations are generally equipped with a dedicated integrated keyboard. The key reason why home host computers do not support integrated keyboards is the lack of an ISA slot for a dedicated keyboard interface card. Software settings are also important. 4.1 Driver installation: Install the IKB during the GUS basic component installation. 4.2 Address settings: The jumper settings for the IKB keyboard interface card are shown in Figure 1. J5 is used for integrated keyboard address settings (J6 is used for touchscreen address settings). The corresponding I/O port address is set through the jumper setting of J7, usually as shown in Figure 1, corresponding to address "338". There are generally two options for integrated keyboard address settings—"4" and "9". This setting must be consistent with the "Port" (COM3) setting in the control panel. Which one to choose depends on the system resource allocation. Sometimes, several devices require the same resources, leading to device conflicts. The symptoms include the keyboard not being found during the power-on self-test, or the keyboard being found but the six alarm indicator lights (System Status, Alarm Status, etc.) on the custom keyboard and integrated keyboard not illuminating when entering the user login screen. If this occurs, you can manually modify the resource settings to ensure each setting is unique. However, sometimes several devices can share the same resources, such as interrupts on PCI devices, depending on the driver and the computer. From the Start menu, select "Administrative Tools," then open "NT Diagnostics," select the "Resource" item corresponding to "IRQ," and check the "IRQ" address for each device. If the "IRQ" for "Tdcaint" (LCNP device driver) in the list is "9," then COM3 must not be set to "9I," but must be set to "4" or another value. To set the interrupt address of the integrated keyboard on a PC: First, open the Control Panel, then select Port, then select the COM3 item for settings (as shown in Figure 2(a)). If COM3 is not present, select "ADD" to add it. Then click "Advanced" and perform the settings shown in Figure 2(b). 4.3 Load the driver by calling the GUS configuration tool, selecting "Devices/Services," and checking the "Integrated Keyboard Driver" option. You can also check if the IKB program is running in the service processes. If the integrated keyboard malfunctions due to some unexpected reason, you can stop and then restart the "IKB Service" process. After completing the above settings, restart the computer, run "Native Window," and then press the "LOAD" key on the integrated keyboard. If the prompt "w, N, 1, 2, 3, 4, x?" appears, it means the integrated keyboard is connected. After "Native Window" finishes loading, the status light on the taskbar will change from yellow to green, indicating that the flowchart screen can be accessed normally. 5. GUS Operator Station User Permission Settings When installing the GUS package, a "GUS" user under "User" is automatically created. Logging in with this user will start a batch program and open the "Native Window" window. By default, the GUS user's security permissions are unrestricted, posing a security risk for maintenance. Therefore, permission settings must be configured. First, open the NT account management tool and assign the GUS user to the "Administrator" group. Then, log in again as the "GUS" user. In the "Run" command prompt of the Start menu, type "Regedt32" to open the Registry Editor. Locate the key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] and create the following value names, with type DWORD and data set to "1": NoCommonGroups: 1; NoDesktop: 1; Nofind: 1; Norecentdocsmenu: 1; Norun: 1; Nosetfolders: 1; Nosettaskbar: 1; Nosmhelp: 1; Noviewcontextmenu: 1; Notraycontextmenu: 1. After modification, log in again as the administrator user and remove the "GUS" user from the "Administrator" group. Restart the workstation; the GUS host installation is now complete. 6. Conclusion After a period of testing, the industrial PC has proven to be a complete replacement for previous models as a GUS workstation, with significantly improved overall performance while also meeting users' requirements for cost savings. It's worth noting that Honeywell's dedicated "Quick Recovery Disk" does not support recovery of the industrial PC in case of system problems. However, quick backup and recovery can be achieved using hard drive backup tools such as "Ghost".