Toshiba GRZ100 B Series, Instruction Manual, Page: 153 / 447

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3.1.5 Human Machine Interface (HMI) Module
The operator can access the GRZ100 via the human machine interface (HMI) module. As shown
in Figure 3.1.5.1, the HMI module has a liquid crystal display (LCD), light emitting diodes (LED),
view and reset keys, operation keys, monitoring jacks and an RS232C connector on the front
panel.
The LCD consists of 40 columns by 4 rows with a backlight and displays record, status and setting
data.
There are a total of 8 LED indicators and their signal labels and LED colors are defined as follows:
Label Color Remarks
IN SERVICE Green Lit when relay is in service.
TRIP Red Lit when trip command is issued.
ALARM Red Lit when failure is detected.
TESTING Red Lit when automatic monitoring function is off.
LED1 Red Configurable LED to assign signals with or without latch when
relay operates.
LED2 Red Configurable LED to assign signals with or without latch when
relay operates.
LED3 Red Configurable LED to assign signals with or without latch when
relay operates.
LED4 Red Configurable LED to assign signals with or without latch when
relay operates.
LED1 to LED4 are user-configurable. Each is driven via a logic gate which can be programmed
for OR gate or AND gate operation. Further, each LED has a programmable reset characteristic,
settable for instantaneous drop-off, or for latching operation. For the setting, see Section 4.2.6.10.
For the operation, see Section 4.2.1.
The model 100, 200 and 300 series provide the scheme switch [AOLED] which controls whether
the TRIP LED is lit or not by an output of alarm element such as THM_ALARM, OV
∗
2_ALARM
and UV
∗
2_ALARM, etc.
The VIEW key starts the LCD indication and switches between windows. The RESET key
clears the LCD indication and turns off the LCD backlight.
The operation keys are used to display the record, status and setting data on the LCD, input the
settings or change the settings.
The monitoring jacks and two pairs of LEDs, A and B, on top of the jacks can be used while the
test mode is selected in the LCD window. Signals can be displayed on LED A or LED B by
selecting the signal to be observed from the "Signal List" or "Variable Timer List" and setting it in
the window and the signals can be output to an oscilloscope via the monitoring jacks. (For the
"Signal List" or "Variable Timer List", see Appendix B or C.)
The RS232C connector is a 9-way D-type connector for serial RS232C connection. This
connector is used for connection with a local personal computer.