FieldServer Driver – SerialFS-8700-19Metasys N2 by JCI
Description
The Metasys N2 by JCI network supports communications with a diverse range of devices. Many N2 compatible devices use their own flavor of the protocol. The different flavors are designed to co-exist on the same N2 network. Care must be taken to ensure the device of interest is covered by the FieldServer implementation.
At present the FieldServer Metasys N2 by JCI driver will support communications with the following devices or classes of devices when acting as a client:
N2Open-compliant devices. N2Open is a published N2-compatible protocol enabling 3rd party device vendors to integrate with N2.
VMA 1400 series (with restrictions, see below)
DX9100 and XT9100
When acting as a server the FieldServer Metasys N2 by JCI driver can emulate an N2Open device only.
Fieldserver Mode
Nodes
Comments
Client
1
Only 1 client node allowed on Multidrop systems. Can communicate with:
N2Open
VMA 1400 series (AI,BI,AO,BO and custom types)
DX9100 / XT9100
Server
255
Number of nodes limited by N2 address space. Can only act as a N2Open server node.
Formal Driver Type
Serial
Client or Server
Connection Information
Connection type:
RS-485 (Two wire, Half-Duplex)
Baud Rates:
9600 (N2 standard)
Data Bits:
8
Stop Bits:
1
Parity:
None
Multidrop Capability:
Yes
Devices tested
Device
Supported
Tested (FACTORY, SITE)
N2Open Device
UNT
Site
VMA1410, VMA1420
Factory and Site
DX9100 with XT9100 extension
Factory and Site
LCP/DX9100
not tested
NCM (FieldServer as N2Open server)
Factory and Site
VAV
Site
AHU
not tested
VND
not tested
PHX
Consult Factory
not tested
Consult Factory
MIG
Consult Factory
not tested
Consult Factory
ILC
Consult Factory
not tested
Consult Factory
IFC
Consult Factory
not tested
Consult Factory
TC-9100
Consult Factory
not tested
Consult Factory
TEC1000
Consult Factory
not tested
Consult Factory
Connection configurations
Connection Notes
Only one N2 client may be connected to a N2 network. If the FieldServer is to act as a client, ensure no other clients are connected to the same N2 network. In the Interceptor Mode the FieldServer can be installed between an existing N2 host and the remainder of the N2 network. It will then intercept the data, and is also able to interleave its own polls for data items not configured in the host in the time between polls sent by the host
Communications functions – Supported functions at a glance:
Function Codes Supported – N2Open:
FieldServer Data Type
Description (or Device Data Type)
Analog_Input
Analog Input (AI)
Digital_Input
Binary Input (BI)
Analog_Output
Analog Output (AO)
Digital_Output
Binary Output (BO)
Float_Reg
Internal Float value (ADF)
Integer
Internal Integer value (ADI)
Byte
Internal Byte value (BD)
Read Operations Supported – N2Open
FieldServer as a Client
FieldServer as a Server
Read Current Value (all data types)
Read Current Value (all data types)
direct read, Change-of-State (COS) poll
direct read, Change-of-State (COS) poll
Read Attribute (all data types):
Read Attribute (all data types):
direct read, specifying a legal attribute number
direct read, specifying a legal attribute number direct read, specifying a legal attribute number
Identify Self command
Write (Control) Operations Supported – N2Open
FieldServer as a Client
FieldServer as a Server
Override Current Value (all data types) implemented as Write on FieldServer
Override Current Value (all data types) implemented as Write on FieldServer
Override Release (all data types)
Override Release (all data types)
Write Attribute (all data types) direct write, specifying a legal attribute number
Write Attribute (all data types) direct write, specifying a legal attribute number
Listing of Supported Attributes – N2Open
Data Type
Attribute No.
Attribute
Analog Input
1
Object Configuration
2
Object Status
3
Analog Input Value
4
Low Alarm Limit
5
High Alarm Limit
6
Low Warn Limit
7
High Warn Limit
8
Differential
Binary Input
1
Object Configuration
2
Object Status
Analog Output
1
Object Configuration
2
Object Status
3
Current Value
Binary Output
1
Object Configuration
2
Object Status
3
Minimum On-Time
4
Minimum Off-Time
5
Maximum Cycles/Hour
Internal Float
1
Object Status
2
Current Value
Internal Integer
1
Object Status
2
Current Value
Internal Byte
1
Object Status
2
Current Value
Unsupported Functions and Data Types – N2Open
Function
Reason
Time Update
Not required
Read Memory Diagnostics
Not required
Warm Start Message
Not required
Status Update Message
Not required
Programming messages (upload, download)
FieldServer is a data transfer device, and as such, programming messages are not required
Data Types Supported – VMA
FieldServer Data Type
Description (or Device Data Type)
Analog_Input
Analog Input (AI)
Digital_Input
Binary Input (BI)
Analog_Output
Analog Output (AO)
Digital_Output
Binary Output (BO)
Float_Reg
Internal Float value (ADF)
Integer
Internal Integer value (ADI)
Byte
Internal Byte value (BD)
Read Operations Supported – VMA
FieldServer as a Client
FieldServer as a Server
Read Current Value (all data types)
Not applicable
Direct Read, Change-of-State (COS) poll
Write (control) Operations Supported – VMA
FieldServer as a Client
FieldServer as a Server
Write / Override Current Value (all data types) implemented as Write on FieldServer
Not applicable
Override Release (AI and BI only) use writes for outputs and internal values
Unsupported Functions and Data Types – VMA
Function
Reason
Programming messages (upload, download)
FieldServer is a data transfer device, and as such, programming messages are not required. Note that the Interceptor Mode will not allow the field devices to be programmed through the FieldServer.
Data Types Supported – DX9100
FieldServer Data Type
Description (or Device Data Type)
Not specified for DX9100 device type
Supported sections of Address Map:
general control module
programmable modules 1-12
analog input modules 1-8
analog output modules 1-2
digital output modules 3-8
extension modules 1-8
time schedules 1-8
optimal start/stop modules 1-2
analog output modules 9-10
auxiliary analog output modules 11-13
Read Operations Supported – DX9100
FieldServer as a Client
FieldServer as a Server
Read of all points supported
Not applicable
Write (control) Operations Supported – DX9100
FieldServer as a Client
FieldServer as a Server
Write of all points supported
Not applicable
DX9100 may not allow writes to specific values
Unsupported Functions and Data Types – DX9100
Function
Reason
Programming messages
FieldServer is a data transfer device, and as such, programming messages are not required
Metasys® as used in this document is a trademark of Johnson Controls, Inc.
