SBS Mk10A Modbus Duo Translator User Guide
- June 17, 2024
- sbs
Table of Contents
SBS Mk10A Modbus Duo Translator
Product Specifications:
- Modbus RTU Port (RS485): 2-Wire, 9600bps, None, 1 Stop Bit
- EDMI CMD Line Port (RS485): 2-Wire, 9600bps, None, 1 Stop Bit
- Meter Port (RS232): 9600bps, None, 1 Stop Bit
Product Usage Instructions
Communication Port Configuration:
By default, the Modbus Duo Translators are configured with the following
settings:
- Modbus RTU Port (RS485): 2-Wire, 9600bps, None, 1 Stop Bit
- EDMI CMD Line Port (RS485): 2-Wire, 9600bps, None, 1 Stop Bit
- Meter Port (RS232): 9600bps, None, 1 Stop Bit
Wiring Diagrams:
Refer to the provided wiring diagrams for Modbus RTU Communication and EDMI
CMD Line Breakout Screw Terminals for proper installation.
Modbus RTU Communication:
The Modbus registers are accessed via Read-Holding-Register (03) requests.
Unsupported requests will result in an error packet. The Modbus ID is either
printed on the device or set to Auto mode.
Internal Update Priority Levels:
The register address space is divided into High, Medium, and Low priority
levels. Each section’s update rates can be controlled via priority settings.
Scriptable slots can be configured for EDMI Meter Registers.
Frequently Asked Questions (FAQ):
-
How can I change the default communication port configuration?
To reconfigure the communication port settings, please contact SBS for assistance. It is recommended to consult with a technical support before making any changes. -
What is the maximum size of script registers for HP, MP, LP, and LPX?
HP and MP script registers allocate 4 Bytes (32 bits) for each result. LP script registers allocate 20 Bytes, and LPX script registers allocate 400 Bytes. Results larger than these limits are truncated to fit. -
Can I configure custom scripts for the Modbus Duo Translator?
Yes, scriptable slots can be configured to any EDMI Meter Register except for File-based access data. Scripts can be set up in the factory by SBS.
Communication Port Configuration
Unless reconfigured in-factory by SBS, Modbus Duo Translators will have the following default configuration:
- Modbus RTU Port (RS485):
- Wiring Mode: 2-Wire (Fixed on Modbus Duo)
- Baud, Parity, Stop Bits: 9600bps, None, 1
- Modbus RTU Port (RS485):
- Wiring Mode: 2-Wire (Fixed on Modbus Duo)
- Baud, Parity, Stop Bits: 9600bps, None, 1
- Meter Port (RS232):
- Baud, Parity, Stop Bits: 9600bps, None, 1
Modbus RTU Communication
- Modbus registers are accessed via Read-Holding-Register (03) requests. Other requests including diagnostics aren’t supported. Units respond to unsupported requests with an error(unsupported) packet containing no payload/comment. The Modbus ID will either be printed on your Modbus device or otherwise be set to “Auto” mode whereby the Modbus ID will automatically be set to the last 2 digits of the connected Meter’s Serial Number (or 100 in the special case where the Meter Serial ends in 00).
- The register address space is divided into 3 internal update priority levels (High, Medium, Low) where internal update rates of each section can be controlled via the priority settings. All priority levels include both some default meter registers and some scriptable slots. Scriptable slots can be configured to any EDMI Meter Register except File-based access data (ie Load Survey Data isn’t supported). Scripts can be configured in factory by SBS.
- Note that HP and MP script registers allocate 4 Bytes (32bits) for each result. LP script registers allocate 20 Bytes and LPX script registers allocate 400 Bytes. Registers with results larger than these internal memory limits are truncated to fit.
Wiring Diagrams
Network Example 1: Typical Dual Modbus and EDMI CMD Line Network
Network Example 2: Modbus Only
(No Breakout Board fitted)
Network Example 3: EDMI Command Line Only
(No Breakout Board fitted)
Network Example 4: Dual Modbus and EDMI CMD Line Network to Moxa Ethernet
Ada
Register Description| Unit| Slot| Modbus Register| Data
Type
---|---|---|---|---
Voltage Phase A| V| Default HP Slot| 9001| Sw. Float
Voltage Phase B| V| Default HP Slot| 9003| Sw. Float
Voltage Phase C| V| Default HP Slot| 9005| Sw. Float
Current Phase A| A| Default HP Slot| 9007| Sw. Float
Current Phase B| A| Default HP Slot| 9009| Sw. Float
Current Phase C| A| Default HP Slot| 9011| Sw. Float
Angle Phase A| Deg| Default HP Slot| 9013| Sw. Float
Angle Phase B| Deg| Default HP Slot| 9015| Sw. Float
Angle Phase C| Deg| Default HP Slot| 9017| Sw. Float
Active Power Phase A| W| Default HP Slot| 9019| Sw. Float
Active Power Phase B| W| Default HP Slot| 9021| Sw. Float
Active Power Phase C| W| Default HP Slot| 9023| Sw. Float
Reactive Power Phase A| Var| Default HP Slot| 9025| Sw. Float
Reactive Power Phase B| Var| Default HP Slot| 9027| Sw. Float
Reactive Power Phase C| Var| Default HP Slot| 9029| Sw. Float
Apparent Power Phase A| VA| Default HP Slot| 9031| Sw. Float
Apparent Power Phase B| VA| Default HP Slot| 9033| Sw. Float
Apparent Power Phase C| VA| Default HP Slot| 9035| Sw. Float
Frequency| Hz| Default HP Slot| 9037| Sw. Float
Angle Va – Vb| Deg| Default HP Slot| 9039| Sw. Float
Angle Va- Vc| Deg| Default HP Slot| 9041| Sw. Float
Power Factor| –| Default HP Slot| 9043| Sw. Float
Total Reactive Energy (Export)| Varh| Default MP Slot| 9141| Sw. Float
Total Reactive Energy (Import)| Varh| Default MP Slot| 9145| Sw. Float
Total Apparent Energy (Export)| VAh| Default MP Slot| 9139| Sw. Float
Total Apparent Energy (Import)| VAh| Default MP Slot| 9143| Sw. Float
Meter Serial Number| –| Default LP Slot| 9151| Sw. UInt32
Meter Current Time| {D}{M}{Y}
{H}{M}{S}
| Default LP Slot| 9153| 6x UInt8
Meter Firmware Version| –| Default LP Slot| 9156| 6x Char
Meter On-Time| {D}{M}{Y}
{H}{M}{S}
| Default LP Slot| 9159| Sw. UInt32
Meter Off-Time| {D}{M}{Y}
{H}{M}{S}
| Default LP Slot| 9161| Sw. UInt32
Load Survey Scales (Curr. N/A)| –| Default LP Slot| 9163| 5x Sw. Float
TOU Setups (Debug)| –| Default LP Slot| 9173| 16x WORD
TOU Auto Find Result (Debug)| –| Default LP Slot| 9189| 2x WORD
Only available in Firmware V2.20 and up| | | |
| | | |
Register Description| Unit| Slot| Modbus Register| Data
Type**
---|---|---|---|---
TOU CH1| | HP1| 9045| Sw. Float
TOU CH2| | HP2| 9047| Sw. Float
TOU CH3| | HP3| 9049| Sw. Float
TOU CH4| | HP4| 9051| Sw. Float
TOU CH5| | HP5| 9053| Sw. Float
TOU CH6| | HP6| 9055| Sw. Float
EDMI Meter Support & Configuration
- SBS Modbus Duo Translators are designed to support all EDMI Atlas Series RS232 meters that are configured with big chip (dual comms) and Modem Power Supply features. EDMI Mk10A, Mk10D, MK10E, Mk10H, Mk7A and Mk7C can all be purchased with these configuration options.
- EDMI Meters must have security and communication ports configured for compatibility with Duo Translator devices. If you are buying Duo’s directly from SBS and haven’t requested your own security information be programmed, then your Duo’s will be using the following default meter USERNAME//PASSWORD: METER//READER
Network Debugging
Most SBS Modbus Duo Network issues are related to incorrect/incompatible
security and communication settings between the Duo and its paired Meter –
these settings have been documented in this Quick Start Guide. For Mk10A
meters, a useful initial check is to ensure your Meter LCD is displaying the Ⓢ
symbol once a Duo device is plugged in to this meter. This symbol will confirm
that the Duo has successfully passed the meter security login and in the case
of “Auto” Modbus ID mode it also means that the Duo will have successfully
retrieved the Meter Serial number to calculate its Modbus ID. In Auto
addressing mode the Duo device will not be accessible over the Modbus network
before this step is successful. Contact SBS using the details below for
further advice.
Smart Building Services Pty Ltd
Phone : +61 (0)7 3285 4344
support@sbs.digital