The SNP Communications enabler uses the Series Ninety Protocol (SNP) to communicate with Series 90 controllers over a serial line.
The SNPX Communications enabler uses the SNPX protocol to communicate with Series 90-30 controllers over a serial line.
SNP and SNPX are half-duplex protocols that uses the RS-485 (enhanced version of RS-422) and RS-232 electrical interfaces. These protocols permit communication between one master and one or more slaves. Communication between CIMPLICITY software and Series 90 controllers may be set up as a point-to-point connection or a multi-drop configuration. Connections may be established on the RS-485 CPU port of the Series 90 or via the CMM card.
Both enablers support the following CIMPLICITY features:
Polled reads at user defined rates
Poll after setpoint
Triggered reads
Analog deadband
Alarm on communications failure
Server Redundancy configurations
Both enablers support the following data types:
Signed 8, 16, and 32 bit integer
Unsigned 8, 16, and 32 bit integer
Floating point
Text
Arrays
SNP and SNPX performance comparison. |
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Supported SNP devices. |
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Supported SNPX devices. |
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Supported SNP and SNPX memory types. |
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SNP hardware configuration requirements. |
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Required SNP and SNPX documents. |
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SNP and SNPX hardware installation (external). |
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SNP and SNPX hardware installation. |
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CIMPLICITY configuration for SNP and SNPX. |
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SNP performance notes. |
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SNP global parameters. |
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SNPX global parameters. |