PTZ-BOX 5.0 User manual, document edition: 13
35
7.4.2
Types of transmitted data
–
GazModem
GazModem protocol allows to: readout of current measurement data, readout of registered
data, readout of events and alarms, time synchronization, modification of parameters values.
All data structures are described in document
“PTZ
-BOX 5.0 User d
ata structure”
.
7.4.3
Types of transmitted data
–
ModBUS
ModBUS protocol allows to readout of current data and modifications of parameters. All of
data structures are described in document
“
PTZ-BOX 5.0 Default ModBUS map
”
.
Structure of current and archival data for readout may be customized to suit User’s needs. On
request of User, Producer may generate ModBUS map, which will determine new order of current
data and records of archival data and will assign them to requested ModBUS registers.
To make device work with ModBUS map
–
prepared map has to be uploaded to device with use of
software tool. Version of uploaded map may be checked by readout of parameter
VerDs6
.
To make modifications with use of ModBUS protocol, it’s necessary to unlock modification possibility
first. To do this, standard authorisation data, i.e. account number and password, has to be written to
register of authorisation (0xFFFE) by consecutive two character strings.
Unlocking of modifications possibility in ModBUS RTU will be automatic
–
when device successfully
verifies authorisation data. From that point, modification will be unlocked until forced logout (by
writing empty character string into register 0xFFFE) or after passing time to automatic logout
(configured in parameter
LogoutTm
).
