Omron V022-E3-1 operation manual Section

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6-5 Notification of the Operating Status to the PC (Determining the NT600S Operating Status)

The status (operating statuses, etc.) of the NT600S can be determined from the PC by reading the “PT status” word in the PT status notify area allocated in the PC memory.

NT600S

PT stopped

Screen number

PC

PT status notify area

Currently displayed screen

Content upgrade memory table

PT status

6-5-1 Ascertainable NT600S Statuses (Notified Operating Statuses)

[“PT status notification bits” of the PT status notify area]

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit

Word m+2

PT status notification bits 0 0

PT status

15	14	13	12	11	10	9	8	Bit
	0				0	0	0

PT operating status

(1(ON) = operating / 0 (OFF) = stopped)

Battery

(1 (ON) = low / 0 (OFF) = normal)

Screen switch strobe flag

Numeral setting strobe flag

The NT600S statuses that the PC can determine are listed below.

Low voltage of battery installed in NT600S (battery: option)

NT600S operating/stopped status

Screen switches

￿Data input

PT operating status (bit 15)

When the NT600S is in the RUN mode this bit is set to ON (1). In other modes and while the system menu is displayed it is OFF (0). When this bit is OFF allo- cated bits and words cannot be read or written to.

During the run mode, ON (1) is periodically written into this bit. In order to check whether the NT600S is operating normally or not, write OFF (0) to this bit : if it is ON (1) 30 seconds later the NT600S is running, and if it is OFF (0), the NT600S is stopped.

Caution In order to ensure system safety, be sure to periodically read the PT operating status bit at the host during operation to confirm that the PT is always operating correctly.

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