Lake Shore Model 370 AC Resistance Bridge User’s ManualChanging IEEE-488 Interface Parameters (Continued)To set the IEEE-488 parameters, press the Computer Interface key and press Enter to skip past Serial Interface BaudRate. The following computer interface screen appears as a prompt for the IEEE-488 address.Computer InterfaceSelect With °®IEEE Address: 12Use the S or T key to select an address between 1 and 30. The default is twelve. Press Enter to accept the newselection and continue to the next setting screen. Press Escape to cancel the new selection and return to the normaldisplay. The next computer interface screen appears as a prompt for the IEEE-488 terminators.Computer InterfaceSelect With °®Term: Cr LfUse the S or T key to select one of the following terminators: CR/LF, LF/CR, LF, and EOI. The default is Cr Lf. PressEnter to accept the new selection and continue to the next setting screen. Press Escape to cancel the new selection andreturn to the normal display.6.1.2 Remote/Local OperationNormal operations from the keypad are referred to as ‘Local’ operations. The Model 370 can also be configured for‘Remote’ operations via the IEEE-488 interface or the Local key. The Local key will toggle between ‘Remote’ and‘Local’ operations. During ‘Remote’ operations, the Remote annunciator will appear in the upper right corner of thedisplay and operations from the keypad will be disabled.6.1.3 IEEE-488 Command StructureThe Model 370 supports several command types. These commands are divided into three groups.1. Bus Control – Refer to Paragraph 6.1.3.1.a. Universal(1) Uniline(2) Multilineb. Addressed Bus Control2. Common – Refer to Paragraph 6.1.3.2.3. Device Specific – Refer to Paragraph 6.1.3.3.4. Message Strings – Refer to Paragraph 6.1.3.4.6.1.3.1 Bus Control CommandsA Universal Command addresses all devices on the bus. Universal Commands include Uniline and Multiline Commands.A Uniline Command (Message) asserts only a single signal line. The Model 370 recognizes two of these messages fromthe BUS CONTROLLER: Remote (REN) and Interface Clear (IFC). The Model 370 sends one Uniline Command:Service Request (SRQ).REN (Remote) – Puts the Model 370 into remote mode.IFC (Interface Clear) – Stops current operation on the bus.SRQ (Service Request) – Tells the bus controller that the Model 370 needs interface service.6-2 Remote Operation
