User Guide v 1.0 — February 2020 SPI Protocol Option
SPI Command Summary 189
Chapter 14 SPI Protocol Option
The Altanium controller communicates with central networks or molding machines that
support the Society of Plastics Industry (SPI) standard protocol.
The system takes the device ID of 26h on the SPI communications channel. This ID has been
assigned to general-purpose temperature controllers with multiple zones. The system
supports a subset of the commands that have been defined for this ID. The commands for
this ID that are not supported by the system do not have equivalent functions in the system.
14.1 SPI Command Summary
The SPI commands supported by the system are listed below. The system supports the
defined poll and select functions for each command. If a selected command is made to all
zones in the system, the error requirements must be satisfied for every zone before an ACK is
returned.
• Echo
• Version
• Process Setpoint 1
• Process Value
• Alarm Active Status
• Alarm 1 Setpoint
• Alarm 2 Setpoint
• Alarm 1 Reset
• Controller Status
• Manual Percentage Output
• Open/Close Loop Control
14.1.1 Echo
Summary SPI controller integrity command.
Errors If the data length for the selected function is incorrect, the system will
return a NAK.
Version Summary The system transmits the device ID (26h) and SPI software version
number.
Errors None.
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