YOKOGAWA CP451-50 Interrupt output will be a level. When set to logical 1, the interrupt output will be pulse in pulse mode, and the interrupt output will drop the current for at least 3 milliseconds. This bit should be set to logical bit.

Wam- Bit 3 Watchdog Alarm Mask - Enable/Disable Watchdog alarm Output when Ipsw (bit 6, interrupt switch) is set to logical zero 0. When set to logical zero 0, watchdog alarm interrupt output will be enabled. When set to logical 1, the watchdog alarm interrupt output is disabled.

Tdm-2nd bit Daily Time Alert Mask - Enable/disable Daily Time alert to interrupt output when Ipsw (see bit 6, interrupt switch) is set to logical 1. When set to logical zero will enable the time of day alert interrupt output.

When set for logic one, the time of day alert interrupt output is disabled. Waf- Bit 1 Watchdog alarm flag - When a watchdog alarm is interrupted. When any watchdog alarms, this bit resets the access register. Interrupt pulse mode or level mode when the interrupt output is set to pulse mode), only when the interrupt output is active.

Tdf- bit 0 Time of Day alarm flag - When an alarm interruption occurs at the time of day. Access the alarm register at any time of day. When the interrupt output is set to pulse mode (see Bit Interrupt Pulse Mode or Level Mode), the flag will only be set to logic-1 when the interrupt output is activated.