Parker PAC, Руководство по установке, Страница: 105 / 197

Module State
Variable Data type Explanation
Shortcut BOOL not used
Undervoltage BOOL not used
Watchdog BOOL Internal watchdog of Module
EtherCAT_Error BOOL Configuration error or watchdog control
Specific_Error BOOL Module-specific fault
OptionsSet BOOL Sent by Module to acknowledge SetOptions
Module-Specific Messages
Apart from the Module error messages, the set of messages below contains details about the current
state of the PACIO AI8 Thermocouple 16 Bit Module. These messages are automatically reset when the
state concerned has returned to normal. They are combined into a single "Specific_Error" state and output
to the IO LED as "Module-
Variable Data type Explanation
Channel_n_Out_of_Range BOOL Measuring value is out of range
*The causes of 'short circuit' and 'broken wire 0.3' are shown for channel 0 (equivalent applies to other
channels).
Conversion Time
The analog signals are converted one by one down every channel. Disabling one or several channels will
shorten the entire analog-to-digital conversion cycle.
'Filter' in this case means to compute an average when the set filter time is over.
Analog value conversion runs cyclically and is not synchronized with the receipt of EtherCAT telegrams.
The cycle consists of the analog value conversion plus transmitting the values into the EtherCAT data area.
Number of Channels Cycle Time in ms Number of channels Cycle Time in ms
1 32 5 167
2 65 6 198
3 97 7 230
4 129 8 262
NOTE: If you are aiming for a high sampling frequency, the PAC should do the filtering (averaging)
because it will normally have much more processing power.
Take the EtherCAT cycle into account to assess how much the values stored by the EtherCAT
master are up-to-date. The Module described in this section will accept the above times as the
ideal EtherCAT cycle setup.