Parker PAC, Installation Manual, Page: 112 / 197

PACIO MODULES
112 Parker Automation Controller Installation Guide
Module-Specific Messages
Apart from the Module error messages, the set of messages below contains details about the current
state of the PACIO AO4-VDC/mA 12 Bit Module. These messages are automatically reset when the state
concerned has returned to normal. They are combined into a single "Specific_Error" state of the Module
and output to the IO LED as "Module-
Variable Data type Explanation
Channel_n_Shortcut BOOL Voltage mode: channel n load is < 600


Specific_Error = TRUE
Channel_n_Open BOOL Current mode: channel n load is > 500 

Specific_Error = TRUE
Channel_n_Overtemp BOOL
Temperature of output driver of channel n is > 140°C (automatic switch-off)

Outputs_Active_Shortcut = TRUE
Undervoltage_24 BOOL Power supplied to Module is < 19.2V

Outputs_Active_Undervoltage = TRUE
Conversion Time
The PACIO AO4-VDC/mA 12 Bit Module has a set cycle time of 320µs that is not affected by the number of
active channels. The cycle time is the time between receipt of the output values and the start of the D/A
converters.