Hakko Electronics Monitouch V9 Series, Connection Manual

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1.4 Hardware Settings
1-47
Control Area
*1 Watchdog
When the PLC is communicating with MONITOUCH, there is no means for the PLC to know whether or not MONITOUCH is doing
operations correctly.
To solve this one-way communication, forcibly change data in the watchdog device memory and check that the same data is saved in the
answer back device memory. This proves that the V series is correctly doing operations through communications with the PLC. This
verification is called “watchdog”.
Item Contents
Screen
Displaying Screen Device
This device memory is used for switching the screen by an external command.
When a screen number is specified in a device memory, the screen is displayed.
When the screen is switched by an internal switch, the currently displayed screen number is
stored in this device memory.
Initial Screen
Set the number of the screen to be displayed at start up.
* When recovering from a communication error, the screen number which was set for the
screen displaying device memory is displayed.
Use a screen displaying
device
When this is checked, the screen number which was set for the screen displaying device
memory is displayed as the initial screen.
Control Device
For more information, refer to the V9 Series Reference Manual.
Info. Output Device
Calendar Setting
PLC Selection
This setting is valid when the V9 s built-in clock is not used.
The setting allows the calendar data to be read from device memory via the selected port at
PLC1 - PLC8.
Calendar Read Device
This setting is valid when the V9 s built-in clock is not used.
This bit should be used differently depending on whether the connected PLC is equipped
with the calendar function.

When MONITOUCH is connected to a PLC with calendar function:
When calendar data in the PLC is updated, it can forcibly be read by setting this bit (at
the leading edge of [0  1]). In addition to calendar data update using this bit, calendar
data in the PLC is automatically read and updated when:
- The power is turned on.
- STOP  RUN
- The date changes (AM 00:00:00).

When MONITOUCH is connected to a PLC without calendar function:
A virtual calendar area can be provided by setting [Calendar Device] in [Other Settings].
Setting this bit (ON) will set the data stored in the calendar device memory as calendar
data for MONITOUCH.
Calendar Information
Output Device
The status of the calendar read device memory is stored.
Other Settings
Watchdog Device When data is saved in this area, the same data is written to [Answer-back Device] after the
screen has been displayed.
Utilizing this operation, these device memory can be used for watchdog monitoring
*1
or
display scanning
*2
.
Answer-back Device
Calendar Device
Use this device memory when the connected device is not equipped with the calendar
function and the V9 series built-in clock is not used.
A-1 A-2 A-3 A-4 A-5
B-1 B-2 B-3 B-4 B-5
C-1 C-2 C-3 C-4 C-5
D-1 D-2 D-3 D-4 D-5
Change data in watchdog device memory
Changes data in answer back device memory
MONITORING