22
WIKA operating instructions premium pressure transducer, model CPT9000
0020504001G 10/2019 EN
EN
Operation
6.1.2.1
Error Query
If errors occur, they are stored in volatile memory in an 11 deep LIFO stack. If the user sends ERR?, the last occurring error will be
transmitted and pop off the queue. Sending CERR will erase the error queue. The following table lists the trappable errors:
Code Error
Cause
0
NO ERROR
No error has occurred since last power up.
1
SENSOR IS OVER PRESSURE
The calculated pressure was greater than the value stored in PRESS_LIM_
MAX
2
SENSOR IS UNDER PRESSURE
The calculated pressure was less than the value stored in PRESS_LIM_MIN
3
SENSOR IS OVER TEMPERATURE
The calculated temperature was greater than the value stored in TEMP_LIM_
MAX
4
SENSOR IS UNDER TEMPERATURE
The calculated temperature was less than the value stored in TEMP_LIM_MIN
5
BOOTLOADER NOT DETECTED
The microcontroller bootloader was not detected
6
I2C TIMEOUT
The microcontroller timed out trying to read or write using I2C
7
UART BUFFER OVERFLOW
The UART buffer received more than 512 bytes of data
8
ERROR QUEUE IS FULL
The error queue is now full. This is the last error to fill the stack
9
OUT OF CAL
The transducer exceeded calibration window
10
EEPROM RUNNING OUT OF SPACE
The EEPROM is 100% full
11
ADC STALLED AND RESET
If ACD doesn’t respond in 50ms (standard) then ADC resets
Table 6.1.2.1 – Possible Errors and Causes
6.1.2.2
Default Command
DEFAULT - This will default the following parameters to the shown settings:
Parameter
Setting
Filter
90
Window
8
Baud
57600
Error Queue
Erased
CMD_SET
0
PRESS_LIM_MIN
Minimum Range. -5% of FS or zero is zero based
PRESS_LIM_MAX
Maximum Range +5% of FS
CUST_UNIT
1
OUTPUT_MASK
0
Table 6.1.2.2 - Default Settings
6.1.2.3
Setting the Command Set
CMD_SET - This will set the transducer to communicate using different command sets:
Command Set
Description
0
Sensor Default Command Set
1
Mensor Legacy
Table 6.1.2.3 – Command Set List
