Nanometrics Data Formats Reference Guide

Chapter 3: Private Data Streams
4 byte int 0
3.3.3 Remove Channels messages
A client sends a RemoveChannels message to remove some or all channels from its subscription.
A RemoveChannels message contains the following information:
1. Data type of the channels to remove (time-series, state-of-health, or triggers).
2. Channels to be removed (given by an array of channel indices, or keys).
If some of the channels indicated in the RemoveChannels message are not in the current
subscription, or do not correspond to the data type indicated in the message, Stream
Manager will respond with an error message stating that there were some channels it
was unable to remove.
3.3.3.1 RemoveTimeSeriesChannels
The RemoveTimeSeriesChannels message is used to remove time-series channels from
the client’s subscription.
Header:
4 byte int Signature = 0x7ABCDE0F
4 byte int message type =130
4 byte int message content length = 4 + 4 * N, where N = number of channels
Content:
4 byte int number of channels to remove = N (use 0 to remove all channels)
N * 4 byte int Channel key for each requested channel
(same as in Channel List message)
3.3.3.2 RemoveSohChannels
The RemoveSohChannels message is used to remove state-of-health channels from the
client’s subscription.
Header:
4 byte int Signature = 0x7ABCDE0F
4 byte int message type =131
4 byte int message content length = 4 + 4 * N, where N = number of channels
Content:
4 byte int number of channels to remove = N (use 0 to remove all channels)
N * 4 byte int Channel key for each requested channel
(same as in Channel List message)
3.3.3.3 RemoveSerialChannels
The RemoveSerialChannels message is used to remove transparent serial channels
from the client’s subscription.
Header:
4 byte int Signature = 0x7ABCDE0F
14602R4
Nanometrics Data Formats
2003-11-07 Reference Guide
39