Chapter 3 Creating and Editing Screens Communication retry times is 3 times Fig. 3-4-3 Communication tab Fig. 3-4-4 PLC Connections Enable / Disable Backlight Bit 1 controls the backlight of HMI. When bit 1 is turned ON, the HMI backlight turns OFF. When bit 1 is turned OFF, the HMI backlight turns ON. For example (refer to Table 3-4-1), if D1 is set to 2 or $16.1 is set to 1, this flag is enabled and the HMI backlight turns OFF. When D1 = 2, it indicates that Bit 1 of D1 is 1(0000 0000 0000 0010). Enable / Disable Buzzer Bit 2 controls the buzzer of HMI. When bit 2 is turned ON, the HMI buzzer turns OFF. When bit 2 is turned OFF, the HMI buzzer turns ON.
For example (refer to Table 3-4-1), if D1 is set to 4 or $16.2 is set to 1, the HMI buzzer turns ON. At this time, if an alarm occurs, it will sound. When D1 = 4, it indicates that Bit 2 of D1 is 1 (0000 0000 0000 0100). Clear Alarm Buffer Bit 3 clears the alarm buffer. When an alarm history table is used, setting this bit is able to clear all data inside of that table. When bit 3 is turned ON, the alarm buffer is cleared. To clear the alarm buffer again, this flag must be turned OFF and then ON again. For example (refer to Table 3-4-1), if D1 is set to 8 or $16.3 is set to 1, this flag is turned ON and the alarm buffer will be cleared.
When D1 = 8, it indicates that Bit 3 of D1 is 1 (0000 0000 0000 1000). Clear Alarm Counter Bit 4 clears the alarm counter. When an alarm frequency table is used, setting this bit is able to clear the values for the alarms. When bit 4 is turned ON, the alarm counter is cleared. To clear the alarm counter again, this flag must be turned OFF and then ON again. For example (refer to Table 3-4-1), if D1 is set to 16 or $16.4 is set to 1, this flag is turned ON and the alarm counter will be cleared. When D1 = 16, it indicates that Bit 4 of D1 is 1 (0000 0000 0001 0000). Revision May, 2010 3-27