Bacharach LonWorks FT-10 Installation Manual

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Bacharach HGM300 to LonWorks FT-10

Introduction

The Bacharach HGM300 to LonWorks Communications Adapter enables an HGM300

Refrigerant Monitor to communicate with a LonWorks FT-10 Free Topology network.

Zone PPM readings, flow status, refrigerant selections, and HGM internal health may be

viewed over LonWorks. Each HGM zone supports three levels of alarming (Leak, Spill,

Evacuate) and each alarm threshold can be set over LonWorks.

The LonWorks Communications Adapter can be used in conjunction with the RDM800

remote display if desired. Wiring details and operation limitations when using the

RDM800 will be discussed later in this document.

Caution

The adapter is powered from the 120V Auxiliary Power connection on the HGM power

supply board. When the HGM is powered up, 120V is present on the lower left corner of

the adapter within the area shown on the board silkscreen. Keep fingers away from this

area when the HGM is powered!!

Adapter Installation Inside HGM300

The communications adapter board will normally be installed in the HGM300 at the

factory. It can, however, be field installed by following the instructions below.

The following installation materials are needed for field installation of the adapter:

(5) 6-32 x ¼" screws (standard finish)

(5) 6-32 x ½" threaded standoffs

(5) 6-32 x ¼" decorative black anodized screws (standard finish OK, black looks nicer)

The adapter board mounts on the rear of the HGM300 door. Position the adapter board

so as not to interfere with the HGM internal components when the door is shut. Mark

(Figure 1) and drill the board's four corner holes and center hole in the door. Install the

five standoffs on the rear side of the door using the five black decorative screws on the

Installation Guide

Communications Adapter

1 of 18

3015-4568

Revision 0

9/11/03

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Summary of Contents for Bacharach LonWorks FT-10

Page 1: Installation Guide
Introduction The Bacharach HGM300 to LonWorks Communications Adapter enables an HGM300 Refrigerant Monitor to communicate with a LonWorks FT-10 Free Topology network. Zone PPM readings, flow status, refrigerant selections, and HGM internal health may be viewed over LonWorks. Each HGM zone supports three levels of alarming (Leak, Spill, Evacuate) and each alarm threshold can be set over LonWorks.
Page 2 If an RDM800 remote display is NOT used with the adapter, refer to Figure 2 for wiring details. In this case, all wiring between the HGM300 main board and adapter is contained within the HGM300 and the only external cable is the LonWorks FT-10 communications cable.
Page 3 If an RDM800 remote display IS to be used with the adapter, refer to Figure 3 for wiring details. Note that when the RDM800 is used, TWO RS-485 cables must be run between the HGM300 and RDM800, so plan accordingly. In either case, be sure to set the HGM300’s internal “Terminator”...
Page 4 4 of 18...
Page 5 Setting HGM Communication Address On Adapter See Figure 4 for the location of adapter dipswitch ‘A’. Switches 5-8 on the adapter’s ‘A’ dipswitch are used to match the node address set on the HGM’s address dipswitch (on HGM main board). Values from 0-15 are possible: HGM address ----------------- ----------------------------------------------...
Page 6 6 of 18...
Page 7 (zero length to disable a zone) must be done with the RDM800 remote display or a laptop PC. Refer to the appropriate Bacharach instructions for configuring these items. HGMs are commonly custom-configured at the factory per the customer’s needs, so field configuring these parameters may not be necessary.
Page 8 HGM Alarm Acknowledge Options Two alarm acknowledge options are supported—Auto Acknowledge and Network Acknowledge. In the Auto Acknowledge mode, the HGM will clear its alarm outputs the next time the alarmed zone is sampled and its PPM has dropped below the alarm thresholds. No intervention from the LonWorks network is necessary.
Page 9 LonWorks Objects and Network Variables The adapter contains one Node Object, sixteen Zone Objects, one General Status Object, and one Alarm Control Object. There is one Zone Object for each refrigerant sampling zone. Object 0 – The Node Object Network input variable nviRequest allows the user to request information from different objects in the node.
Page 10 Network output variable nvoStatus returns the information requested by nviRequest. The status response will indicate the status of the object that received the request. The status bits supported are listed above under RQ_REPORT_MASK. One nvoStatus response will be returned for each nviRequest. The configuration variable nciMaxStsSendT can also be used to automatically send out status updates periodically.
Page 11 Objects 1-16 – Zone Objects There is one Zone Object for each sampling zone in the HGM300 (16 total): Network output variable nvoHgmZonePPM shows the measured gas concentration for a particular zone. The value will range from 0-65535 PPM. Network output variable nvoHgmZoneStatus is a text string that displays information about the zone status and the refrigerant type being sensed.
Page 12 CRITICAL FAULT Some critical fault prevents normal zone PPM measurement. (View nvoHgmFaults for details on fault type) HGM BUSY Occurs with RDM800 installed when certain screens are displayed. COMM FAULT 1 Comm failure between HGM and adapter. COMM FAULT 2 Comm failure between adapter internal processors.
Page 13 Object 17 – General Status Object The General Status Object provides information about any HGM300 internal faults present and shows which zone is currently being sampled: Network output variable nvoHgmFaultAlert reports whenever ANY fault is detected within the HGM or adapter. It is of type SNVT_switch. It is useful for binding to a Fault lamp on a remote annunciation panel using a network input variable of type SNVT_switch.
Page 14 HGM Busy (if RDM800 attached and showing certain screens)(bit 4) Comm Fault 1 (communications failed between HGM and adapter)(bit 3) Comm Fault 2 (internal communications failed within adapter)(bit 2) Unused (bit 1) Unused (bit 0)(least significant bit) Network output variable nvoZoneSampling shows which zone is currently being sampled by the HGM.
Page 15 Object 18 – Alarm Control Object The Alarm Control Object provides information about any alarms which are present in the HGM. It also provides mechanisms for acknowledging alarms, and for viewing and setting the Leak, Spill, and Evacuate alarm thresholds for each zone: Network input variable nviHgmAlarmAck has a single parameter (unsigned short) which specifies which zone alarm the operator wishes to acknowledge.
Page 16 Network input variable nviSetZoneThresh allows Leak, Spill, and Evacuate alarm thresholds (in PPM) to be set for each monitoring zone. nviSetZoneThresh has four parameters to be set by the user: Zone Specifier: a number 1-16 specifies which zone is having its thresholds changed Leak Alarm Threshold: a number 0–65535 PPM Spill Alarm Threshold:...
Page 17 Network output variable nvoHgmZoneThresh displays the following information for the zone specified by nviGetZoneThresh: 1. Zone (1-16) whose alarm thresholds are being displayed 2. Leak Alarm Threshold in PPM (0-65535) 3. Spill Alarm Threshold in PPM (0-65535) 4. Evacuate Alarm Threshold in PPM (0-65535) To change the Leak, Spill, or Evacuate alarm thresholds for a zone, use the nviSetZoneThresh input network variable as described earlier.
Page 18 LED 1 and LED 2 will normally show activity about every 15 seconds. Since the refrigerant monitoring process is fairly slow and new data is only available every 15 seconds or so, the adapter polls the HGM at a slow rate to reduce the communications burden on the HGM main processor.

This manual is also suitable for:

Hgm300