GT_AlarmHistoryControl_DUT

This is a predefined DUT with overlapping elements. The DUT can be used for communication between the PLC and a touch terminal of the GT series.

When you have made settings in GTWIN for the alarm history or defined a group, the alarm history control function becomes available. Select On if you want to use it and then select a register as the control device.

Alarm History tab in GTWIN with control device enabled

The control device helps you monitor group no. 0 and/or group no. 1 and provides the following functions:

• start and stop monitoring the alarm history of a group

• check whether the memory of a group is full

• clear the memory of a group

• check whether clearing the memory is completed

• save the history of a group to an SD card

• check whether the saving of a group to an SD card is completed

The table below explains the bit assignment of the control device.

When a bit is set, the status is TRUE, i.e. the function is executed.

• Memory clear

  When bit 9 is set to 1, the memory for group no. 1 is full. Clear it by setting bit 1 of byte n+1 (R211 if WR20 is the control device selected) to 1.

  

  1.  (1) Clear memory (R211) (Write in PLC)
  2.  (2) Memory clear completed (R218) (Write in GT)
  3.  (3) Start clearing memory
  4.  (4) When GT acknowledges, the bit "Clear memory" turns on
  5.  (5) Clearing memory
  6.  (6) Memory cleared
  7.  (7) When the bit "Clear memory" turns off, complete bit will turn off
  8.  (8) Bit turns on

• Save history in SD card

  Save the history of group no. 0 to the SD card by setting bit 4 of byte n (R204 if WR20 is the control device selected) to 1.

  

  1.  (1) Save history in SD (R204) (Write in PLC)
  2.  (2) Saving completed (R20C) (Write in GT)
  3.  (3) Start saving
  4.  (4) When GT acknowledges, the bit "Save history in SD" turns on
  5.  (5) Saving in SD
  6.  (6) Saving completed
  7.  (7) Bit turns on
  8.  (8) When the bit "Save history in SD" turns off, complete bit will turn off