General
Functions
The Spectrum Controls’ HART protocol output module for the 1734 system provides ControlLogix controllers with 2-channels of analog output capability, and HART (Highway Addressable Remote Transducer protocol) communications. As a HART master, it provides communication with eight HART field devices without external HART bridge devices or hand-held communicators. A dedicated HART modem is used for each channel for maximum throughput.
This Analog+HART I/O module offers:
- Simultaneous analog current measurements and HART data on each channel.
- User-selectable range type (current or voltage), process and rate alarms, under/over-range detection, time-stamping, and filter frequencies.
- Full HART Read/Write Master capability, with "auto acquisition” of attached slave devices.
- Ability to program and monitor HART devices from a single workstation.
- Processor independent messaging capability.
- Support from RSLogix5000 programming software for installation and operation.
- User calibration of analog functionality
Field Interface
- 2 analog outputs with 16 bit resolution.
- Configurable output type: Current 0-20 mA, 4-20 mA (HART capability)
- Each channel provides selectable, low and high clamp value, hold last state, and clamp and fault value.
- Field connector and cables:
- Standard removable terminal base; 1734-TB or 1734-TBS, which includes the 1734-TOP and TOPS removable terminal block; ordered from Rockwell Automation; RTB mechanical keying.
Refer to the modules "Owner’s Guide” for recommended shielded twisted-pair cable, a list of standard pre-wired cables from Rockwell Automation, and complete wiring recommendations.
Module Identity
The module Identity includes the following Device attributes ( refer to "EDS File” below):
- Vendor ID: 58 Vendor Name: “Spectrum Controls, Inc.”
- Product Type: 10 Product Type Name: “Multi-Channel Analog I/O”
- Product Code: 27 Product Name: 1734sc-OE2CIH 2 PT HART OUTPUT
Data
The following module data types and tags are created by the AOP:
- HART Dynamic Variables; Primary, Secondary, Tertiary, Fourth
- HART device codes, extended status, ASCII message descriptors
- HART multiplexed auto-acquisition device data
- Analog values; 32 bit IEEE floating point
- Status and Diagnostics
Other tags are created by the user for message buffers, etc. To minimize the effort creating these additional tags, and the potential for errors, import or copy the tags from the Sample Project file (see "Sample Projects” section below). Refer to the "Owner’s Guide” for a detailed description of the tags.
Communication
1734 Backplane Communication
- Unconnected messaging from controller (MSG instruction) or from a CIP network client.
- CIP messages to the HART module
- HART pass-through messages to HART device; any HART command
NOTE
: Refer to detailed protocols and MSG examples described in the modules "Owner’s Guide”, and examples in the module’s RSLogix5000 Sample Projects.Field-side Comm: HART Primary Master
- Polls all slave devices; 6.5 second average poll for all 2 HART channels
- HART multi-drop is not supported
- Compatible with HART secondary master (hand-held configurator)
Bus Power
From the 1734 backplane: +24V @ 220mA field power is provided to the plug-in module through the Module Backplane.
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