ACQ Command

Applies to: ALL modes (general purpose).

The ACQ command starts or stops the current measurement acquisition from the CT-BOX device. The device starts to acquire measurements as soon as the command ACQ:ON is received; a stop command ACQ:OFF has to be sent in order to terminate the data acquisition.

Note

The acquisition state at power-up depends on the start-up configuration of the device: in Saved configuration the acquisition is not active, while in Desktop configuration the acquisition starts automatically. For details, refer to the CT-BOX User’s Manual.

If a client disconnects from the CT-BOX, the unit responds in two different ways, according to its operation mode:

  • DLOG and DMM modes: the acquisition is not stopped, thus allowing to save data on the SD card and/or to see acquired data on the CT-BOX display;

  • OSC mode: the acquisition is stopped immediately.

Command Format:

R/W

Command

Response

Description

W

ACQ:ON

ACK / NAK:x

Start the measurements acquisition

W

ACQ:OFF

ACK / NAK:x

Stop the measurements acquisition

R

ACQ:?

ON / OFF

Read the acquisition status

If the command is not accepted, the unit replies with a NAK:x string, where the x field indicates the error code (see List of the Error Codes).

Important

The data stream to the communication interface is visible only if both the acquisition (ACQ) and the printing (PRINT) are enabled. For more detail regarding the data representation, see Data Representation.

Example(s):

ACQ:ON in OSC mode with PRINT enabled:

ACQ:ON
ACK
0x000001 0x00 0x41200000
0x000002 0x00 0x41200000
.........

ACQ:OFF in OSC mode with PRINT enabled:

.........
0x00AB03 0x00 0x41200000
0x00AB04 0x00 0x41200069
0x00AB05 0x00 0x41200073
ACQ:OFF
ACK

ACQ:ON in OSC mode with PRINT enabled afterwards (note that in this case the first acquisitions 0x01 – 0x10 are not displayed, because the PRINT command is enabled later):

ACQ:ON
ACK

PRINT:ON
ACK
0x000011 0x00 0x41200000
0x000012 0x00 0x41200073
.........