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Section 5-5
Battery (bit 13)
If the voltage of the backup battery for the NT600S memory becomes low,this bit
is set to ON (1).
- This bit is valid only when DIP switch 2-8 is ON (1).
- Backup battery is optional.
Screen switch strobe flag (bit 12)
When the screen displayed on the NT600S is switched by a designation from the
PC or by the standalone function, the screen switch strobe flag comes ON (1).
On notification to the PC, it returns to the OFF (0) status.
For details on how the screen switch strobe flag is used, see “Notifying the dis-
play screen to the PC” (page 162).
Numeral setting strobe flag (bit 11)
When numerical data is input to a numeral table using the NT600S numeral set-
ting function, the numeral setting strobe flag comes ON (1). On notification to the
PC, it returns to the OFF (0) status.
For details on how the numeral setting strobe flag is used, see “Notification of
Numbers to the PC” (page 189).
6-5-2 Reading the NT600S Operating Statuses
This section explains how to determine the status of the NT600S, and ascertain its
operating status.
To ascertain the operating status of the NT600S, “PT status” is used.
The NT600S automatically notifies information such as the operating status to the
PT status wordof the PT status notify area (PT → PC) allocated to the PC memory
as shown below.
Notification of operation mode: PT operating status
Notification of low battery voltage: Battery
Notification of screen switching: Screen switch strobe flag
Notification of numerical data upgrade: Numeral setting strobe flag
Restrictions on allocating words
The PT status notify area (PT → PC) can be allocated to the PC memory areas
listed in the following table.
Symbol CSeriesPCs Allocated CVM1/CV Series PCs Allocated
DM Data memory
✓
Data memory
✓
CH Internal/Special Relay
✓
Internal/Special Relay
✓
TIM Timer Timer
CNT Counter Counter
HR Holding Relay
✓
--
AR Auxiliary Relay
✓
Auxiliary Relay
LR Link Relay
✓
--
✓
:OK :NG