# Advanced Channel Settings

To access the Advanced Channel Settings, click on the “Advanced” or “Change Mode” buttons on the Channel settings dialogs.

Channel Modes

Channel Modes involve various ways in which the Catalyst can process a channel's raw data to derive new data useful for monitoring and alarming applications. Each mode may also have additional, mode-specific, configuration options. The default messages for both text and speech depends on channel mode. The allowable modes depend only on the raw input data type.

Note: Successful operations of certain modes depend on the channel scan time and latencies.

Discrete Mode

In this mode, discrete raw value channels current reading is unchanged.

Analog Mode

This mode is allowed for analog (16-bit, 32-bit, IEEE32) raw type SNAs only. This is simply the mode in which non-discrete raw value channels operate.

Value Scaling

The Scaling Options allow you to change how the raw channel value is interpreted. By leaving the value scaling setting at "Default (raw)" the channel's current reading will be unchanged. The Physical Input type and the SNA determine the channels raw value type as either DISCRETE, INTEGER or IEEE32. Table 1.1 details the logic here. Raw channel values are always numeric. The range of values for physical analogs will depend on the resolution of the ADAC hardware.

SNA | Description | Data Type | Raw Type
0*module*point | Physical Input point Catalyst only supports module=1 and point=1--4 | Boolean or uint16 per point's configuration | DISCRETE or INTEGER
1*…*0xxxx | Remote discrete output | Boolean | DISCRETE
1*…*1xxxx | Remote discrete input | Boolean | DISCRETE
1*…*3xxxx | Remote analog input | uint16 | INTEGER
1*…*4xxxx | Remote analog output | uint16 | INTEGER
1*…*5xxxx | Remote analog output | float | IEEE32

Table 1.1

Operators have several options in transforming the raw value into the value used by the alarm criteria and reports. These options are listed in table 2.1 below. The result of this scaling determines the channel type.

Remember that raw values are reported only when using the “direct channel reading” or “read external net address” screens in Alarmware or via the FP code 03Z. All other reports and commands use the value resulting after the scaling has been applied.

Raw Type | Option | Description | Channel Type
DISCRETE | Default | No scaling, raw value. | DISCRETE
INTEGER or IEEE32 | Default | No scaling, raw values and types. | INTEGER or IEEE32
| Scaled Gain / Offset | Conversion to engineering units using slope-intercept concept. | IEEE32
| Scaled 2-point | Conversion to engineering units using 2 sample point concept. | IEEE32

Table 2.1

Also, certain scaling options require rapid sampling of the underlying data. They can only apply to channels using physical IO points. The default transformation for all channel types is “raw”. Alarmware must be used to select any other option. There are no Front Panel codes for configuring these options.

For the scaled options, any data that would result in an infinite or zero gain is rejected with an error message. The same applies for data resulting in an infinite offset.