GE IS200ISBAH1ABA Gas turbine system circuit card

Description

GE General Electric Technical Specifications: IS200ISBAH1ABA

These setpoints may be used during startup or testing to verify that the analog outputs are functioning correctly. The analog

outputs can be forced only if the generator is offline, no current is measured, and there are no trips or alarms active. When

the FORCE ANALOG OUTPUTS FUNCTION is “Enabled”, the output reflects the forced value as a percentage of the range

4 to 20 mA or 0 to 1 mA. Selecting “Disabled” places all four analog output channels back in service, reflecting their pro

grammed parameters. If the IS200ISBAH1ABA measures current or control power is cycled, the force analog output function is automati

cally disabled and all analog outputs will revert back to their normal state.

During communications troubleshooting, it can be useful to see the data being transmitted to the IS200ISBAH1ABA from some master

device, as well as the data transmitted back to that master device. The messages shown here make it possible to view that

data. Any of the three communications ports may be monitored. After the communications buffers are cleared, any data

received from the monitored communications port is stored in Rx1 and Rx2. If the IS200ISBAH1ABA transmits a message, it appears in

the Tx1 and Tx2 buffers. In addition to these buffers, there is a message indicating the status of the last received message.

Measured values, maintenance and fault analysis information are accessed in the Actual Value mode. Actual values may

be accessed via one of the following methods:

1. Front panel, using the keys and display.
2. Front program port, and a portable computer running the 489PC software supplied with the relay.
3. Rear terminal RS485 port, and a PLC/SCADA system running user-written software.

Any of these methods can be used to view the same information. However, a computer makes viewing much more conve

nient since many variables may be viewed simultaneously.

Actual value messages are organized into logical groups, or pages, for easy reference, as shown below. All actual value

messages are illustrated and described in blocks throughout this chapter. All values shown in these message illustrations

assume that no inputs (besides control power) are connected to the IS200ISBAH1ABA .

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