PTZ-BOX 5.0 User manual, document edition: 13
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current configuration and current data. Via the FTP server it is also possible to reconfigure the device
and replace the software in OTA mode (Over The Air) without affecting the operation of the device.
The device is available online when using external power supply. This means that it can be read by
external systems on demand, and in the event of an alarm, the service is immediately informed.
In this mode, full diagnostics of the device are also available, direct reading of all available
parameters, including statistical counters of the device, archived data recorded, a complete list of
events. This mode also allows you to reconfigure parameters in real time.
Transmission protocols
Realization of transmission protocols is based on fact, that device readout is done by host PC.
Commands sent to device are to give in return specific type of information. Information received by
and send from device is organized in functional blocks of programmed length. Optimal length of
blocks adapted to quality of connection can have essential influence on efficiency of data sending.
Device supports data transmission protocols:
•
GazModem
–
version 3
–
this is native protocol of the device,
•
ModBUS
–
RTU and TCP (modem only).
Device recognizes transmission protocol automatically.
Transmission protocols implemented in PTZ-BOX 5.0 differ from each other by functionality of
remote readout and parameters modification.
7.4.1
Restrictions of remote data access
Device’s software allows to restrict remote access to measurement data when using all available
transmission protocols. When lock of remote access is active, only readings of following data is
possible from device:
•
nameplate,
•
structure of table with available parameters (DP),
•
structure of events table (ZD).
Readout of current and archival data is not possible.
Configuration of that function is done with parameter
LockRead
. When set to 0
–
device allows
remote readout of all data without limitations. When value is set to 1
–
device will automatically lock
ability for remote readout when interruption in readouts was longer than set time limit, configurable
on parameter
LogoutTm
.
When lock is active, any readout attempt will cause sending by device:
- in GazModem protocol: response 7D hex with empty data field,
- in ModBUS protocol: response 83 hex with empty data field.
To make readouts possible again, user must send authorization command to device (by using
ModBUS or GazModem protocol), which contains login credentials, i.e. account number and
password.
