User manual

Automation Protocol Transport Layer
Miranda Technologies Ltd Page 29
As the STX of the response matches the STX of the command, sending a
command list containing multiple status requests will cause multiple
responses with identical STX bytes.
Unsolicited Messages (Tallies)
1
Unlike status replies, which are only returned in response to particular
commands, unsolicited messages can be sent by the Imagestore at any point
based on changes in state. Unsolicited messages are distinguished by the
leading STX2 byte.
Field Contents
Byte 0 STX2
Byte 1..n-1 Status Response
Byte n Status Terminator ‘:’
Byte n+1 CRC low
Byte n+2 CRC high
Various types of unsolicited messages are generated by Imagestore, including
audio metering data, video and audio tallies, and other status information.
The transmission of metering data and tallies must be explicitly enabled by
the automation system.
1
Supported in Imagestore 2/2U/3 version 2.08 and later, plus all newer
products