subject: Selecting the Programmer Operating Mode of Logicmaster PLC [print this page] Selecting the Programmer Operating Mode of Logicmaster PLC
Both the programmer and the configuration software operate in three modes: OFFLINE, MONITOR, and ONLINE. In OFFLINE mode, no data transfer takes place between the computer and the PLC. Programs and configuration data may conveniently be developed in OFFLINE mode, with or without the computer connected to a PLC. In MONITOR mode, if communications have been established between the computer and the PLC, the computer can read data from the PLC but may not transfer data to it. With communications established in ONLINE mode, programs and other data can be transferred between the PLC and the computer. If you are using a Workmaster or CIMSTAR I industrial computer, you may configure the Logicmaster 90-70 software to use the keyswitch to select the operating mode. For those computers without a keyswitch, or if the keyswitch is not enabled, mode selection can be made by: Pressing the ALT and M keys simultaneously; i.e., press the ALT key and hold it down, then press the M key. Repeatedly pressing ALT-M switches the operating mode from OFFLINE to MONITOR to ONLINE and then back to OFFLINE. _ Going to the Programmer Setup screen (Shift-F7) and selecting an operating mode. For more information on using the Programmer Setup screen to select the operating mode. System SecuritySecurity for configuration and program functions consists of:A range of four privilege levels for the PLC, which may be protected using passwords.A software lock that can be applied to individual program folders.A selectable operating mode.A software lock that can be applied to individual program blocks.An OEM key. PasswordPLC are a configurable feature of the Series 90-70 PLC. Their purpose is to provide different levels of access privilege for the PLC when the programmer is in ONLINE mode. Passwords may not be set, or the password access (privilege) level may not be changed, when the programmer is in OFFLINE mode. The use of passwords is optional and may be set up using the status functions in the configurator. Passwords may be used to restrict changing I/O and PLC configuration data, changing programs, and clearing faults. Program folders can be protected to prevent accidental changes to program and configuration information. Each program folder can be either "locked" or "unlocked". After a folder is locked, its contents cannot be changed or deleted. For more information on locking program folders. Setting up PLC Communications using a WSI BoardFor the WSI version of Logicmaster 90-70 software, the serial port on the Work Station Interface (WSI) Board in the programmer provides serial communication between the programmer and the attached PLC. The COMSET serial port setup function is used to configure the WSI serial port, and to save or recall those configurations from disk files. "WSI Serial Port," for instructions on WSI serial port setup. The parallel port on the WSI Board requires no port setup; however, you must select PARALLEL as the port connection. Setting up PLC Serial CommunicationsFor the standard serial communications version of Logicmaster 90-70 software, the COM1 or COM2 serial port may be set up to provide serial communications between the programmer and the attached PLC. The COMSET serial port setup is used to configure the COM1 or COM2 serial port, and to save or recall those configurations from disk files. Program FoldersEach program and the corresponding configuration is assigned to a subdirectory called a program folder. Both the configuration software and the programming software use a set of program utility functions to create and maintain program folders. "Program Folders," explains how to use the program folder functions to:Select another program folder.Create a new program folder.Delete an unneeded program folder.Rename a program folder.Make a backup copy of the current program folder.Restore a program folder with its backup copy.Clear the contents (entire or selective) of the current program folder.Lock/unlock a program folder.Copy the contents (entire or selective) of one program folder into the current program folder. http://www.articlesbase.com/electronics-articles/selecting-the-programmer-operating-mode-of-logicmaster-plc-4356932.html
