Huawei RMS-MODBUS01A User manual

Part Number: 31500GQE
RMS-MODBUS01A
User Manual
Issue 05
Date 2021-11-18
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
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and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specied in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
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Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Purpose
This document describes the RMS-MODBUS01A card in terms of its appearance,
structure, functions, ports, installation, and networking. The card is an optional
communications component of the UPS2000-G-(6 kVA–20 kVA) and UPS2000-A-
(6 kVA–10 kVA).
It has an exquisite, advanced, and unique design, and features high performance
and reliability.
Intended Audience
This document is intended for:
● Sales engineers
● Technical support engineers
● System engineers
● Hardware installation engineers
● Commissioning engineers
● Data conguration engineers
● Maintenance engineers
Symbol Conventions
The symbols that may be found in this document are dened as follows.
Symbol Description
Indicates a hazard with a high level of risk which,
if not avoided, will result in death or serious
injury.
Indicates a hazard with a medium level of risk
which, if not avoided, could result in death or
serious injury.
RMS-MODBUS01A
User Manual About This Document
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. ii

Symbol Description
Indicates a hazard with a low level of risk which,
if not avoided, could result in minor or moderate
injury.
Indicates a potentially hazardous situation which,
if not avoided, could result in equipment damage,
data loss, performance deterioration, or
unanticipated results.
NOTICE is used to address practices not related to
personal injury.
Supplements the important information in the
main text.
NOTE is used to address information not related
to personal injury, equipment damage, and
environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all updates made in previous issues.
Issue 05 (2021-11-18)
Updated the DIP switch settings.
Issue 04 (2015-05-15)
Available for UPS2000-A-(6 kVA–10 kVA).
Issue 03 (2014-03-19)
Updated the pictures in this document.
Issue 02 (2013-08-24)
● Updated the RS232-RS485 isolated adapter model used by the RMS-
MODBUS01A card.
● Updated the pictures in this document.
Issue 01 (2013-05-15)
Released the rst version.
RMS-MODBUS01A
User Manual About This Document
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. iii

Contents
About This Document................................................................................................................ ii
1 Safety Information.................................................................................................................. 1
2 Overview....................................................................................................................................2
2.1 Introduction............................................................................................................................................................................... 2
2.2 Functions.................................................................................................................................................................................... 2
3 Function Description...............................................................................................................4
3.1 External Ports............................................................................................................................................................................4
3.2 DIP Switch.................................................................................................................................................................................. 5
3.2.1 DIP Switch Setting (02355639)....................................................................................................................................... 5
3.2.1.1 Functional DIP Switch S1............................................................................................................................................... 5
3.2.1.2 Address DIP Switch S2.................................................................................................................................................... 6
3.2.2 DIP Switch Setting (02354GLU)................................................................................................................................... 10
3.2.2.1 Address DIP Switch........................................................................................................................................................ 11
3.2.2.2 Functional DIP Switch...................................................................................................................................................13
4 Installation..............................................................................................................................15
4.1 Unpacking and Checking................................................................................................................................................... 15
4.2 Installation Preparations.................................................................................................................................................... 15
4.3 Installation Procedure......................................................................................................................................................... 16
4.4 RMS-MODBUS01A Card Settings.................................................................................................................................... 17
5 Networking............................................................................................................................. 20
5.1 Single UPS Networking....................................................................................................................................................... 20
5.2 Parallel System Networking.............................................................................................................................................. 20
5.3 Hybrid Networking............................................................................................................................................................... 21
A Acronyms and Abbreviations............................................................................................. 22
RMS-MODBUS01A
User Manual Contents
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. iv

1 Safety Information
1. Only the professional technical personnel designated by the manufacturer are
allowed to install and operate the RMS-MODBUS01A card.
2. Carefully read this document before operating the RMS-MODBUS01A card.
Keep this document for future use.
3. Before handling the Modbus card, get tools insulated, and take o metal
articles such as watches and rings.
4. To avoid damage, handle the RMS-MODBUS01A card gently.
RMS-MODBUS01A
User Manual 1 Safety Information
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. 1

2 Overview
2.1 Introduction
The RMS-MODBUS01A card provides an RS485 networking solution for remote
UPS management.
Table 2-1 Basic specications of the RMS-MODBUS01A card
Model Appearance Description
RMS-MODBUS01A Applicable models:
UPS2000-G-(6 kVA–20
kVA) and UPS2000-A-(6
kVA–10 kVA) series
Supported protocol:
Modbus
Physical layer
communication: RS485
dierential level (two-
wire or four-wire system)
Operating environment:
–40°C to +65°C; 5%–95%
RH
2.2 Functions
Table 2-2 lists the functions of the Modbus card, which are implemented by
setting dual in-line package (DIP) switches.
RMS-MODBUS01A
User Manual 2 Overview
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Table 2-2 RMS-MODBUS01A card functions
Function Description
Provides a DIP switch for selecting an
RS485 communications protocol.
Supports the Modbus protocol by
setting the DIP switch.
Provides a DIP switch for selecting a
two-wire or four-wire system.
The two-wire or four-wire system can
be selected based on customer
requirements.
Provides a matched resistance DIP
switch.
You are advised to install a build-out
resistor at the remote end of the cable
only when the cable length is greater
than 200 meters. A maximum of 32
RMS-MODBUS01A cards can be
connected in series to a bus.
Provides a DIP switch for setting the
optional card address.
8-bit hardware address DIP switch
Supports hot swapping. You can remove and insert the
Modbus card without powering o the
UPS during networking and
maintenance.
RMS-MODBUS01A
User Manual 2 Overview
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3 Function Description
3.1 External Ports
The Modbus card provides two identical RJ45 ports for networking.
NO TE
● The two RJ45 ports are internally connected and have the same functions.
● The product 02354GLU does not support the YDN protocol.
Figure 3-1 RJ45 ports
Table 3-1 RJ45 pins
Pin No. Signal
1 Four-wire system: RS485TX+
Two-wire system: A
2 Four-wire system: RS485TX-
Two-wire system: B
3 None
4 RS485RX+
5 RS485RX-
6 GND
RMS-MODBUS01A
User Manual 3 Function Description
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Pin No. Signal
7 None
8 None
3.2 DIP Switch
3.2.1 DIP Switch Setting (02355639)
S1 and S2 are respectively a functional DIP switch and an 8-bit address DIP switch
for the RS485 port.
Figure 3-2 DIP switches
3.2.1.1 Functional DIP Switch S1
Figure 3-3 RS485 functional DIP switch S1
RMS-MODBUS01A
User Manual 3 Function Description
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Table 3-2 Description of the RS485 functional DIP switch S1
Switch No. Denition DIP Switch
Setting
Remarks
1 Reserved ON: 0
OFF: 1
Toggle switches 1,
2, and 3 form a 3-
bit baud rate DIP
switch. Currently,
the software
version supports
only 9600 bit/s.
(Toggle switches
1, 2, and 3 are set
to ON for this
baud rate.)
2 Reserved ON: 0
OFF: 1
3 Reserved ON: 0
OFF: 1
4 RS485 protocol
DIP switch
RS485_PROTOCO
L
ON: 0
OFF: 1
0: Modbus
protocol
1: YDN-23
protocol
5 Toggle switch for
selecting a two-
wire or four-wire
system
ON: two-wire
system
OFF: four-wire
system
Toggle switches 5
and 6 must be set
to the same
status.
6 Toggle switch for
selecting a two-
wire or four-wire
system
7 Control area
network (CAN)
build-out resistor
toggle switch
ON: with a build-
out resistor
OFF: without a
build-out resistor
None
8 RS485 build-out
resistor toggle
switch
ON: with a build-
out resistor
OFF: without a
build-out resistor
None
NO TE
By default, the RS485 DIP switch is connected to pins 1 and 2 in two-wire mode and to pins
1, 2, 4, and 5 in four-wire mode.
3.2.1.2 Address DIP Switch S2
Modbus Protocol
RMS-MODBUS01A
User Manual 3 Function Description
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NO TICE
When you select the Modbus protocol, set toggle switch 4 of the functional DIP
switch S1 to ON.
Table 3-3 Description of the RS485 address DIP switch S2
Switch No. Denition DIP Switch Setting
1 Address DIP switch
485_ADDR0
ON: 0
OFF: 1
2 Address DIP switch
485_ADDR1
ON: 0
OFF: 1
3 Address DIP switch
485_ADDR2
ON: 0
OFF: 1
4 Address DIP switch
485_ADDR3
ON: 0
OFF: 1
5 Address DIP switch
485_ADDR4
ON: 0
OFF: 1
6 Address DIP switch
485_ADDR5
ON: 0
OFF: 1
7 Address DIP switch
485_ADDR6
ON: 0
OFF: 1
8 Address DIP switch
485_ADDR7
ON: 0
OFF: 1
You can use the binary method to set the DIP switch.
Table 3-4 Mapping between addresses and toggle switches
Addre
ss
DIP1 DIP2 DIP3 DIP4 DIP5 DIP6 DIP7 DIP8
1 OFF ON ON ON ON ON ON ON
2 ON OFF ON ON ON ON ON ON
3 OFF OFF ON ON ON ON ON ON
4 ON ON OFF ON ON ON ON ON
5 OFF ON OFF ON ON ON ON ON
6 ON OFF OFF ON ON ON ON ON
RMS-MODBUS01A
User Manual 3 Function Description
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Addre
ss
DIP1 DIP2 DIP3 DIP4 DIP5 DIP6 DIP7 DIP8
7 OFF OFF OFF ON ON ON ON ON
8 ON ON ON OFF ON ON ON ON
9 OFF ON ON OFF ON ON ON ON
10 ON OFF ON OFF ON ON ON ON
11 OFF OFF ON OFF ON ON ON ON
12 ON ON OFF OFF ON ON ON ON
13 OFF ON OFF OFF ON ON ON ON
14 ON OFF OFF OFF ON ON ON ON
15 OFF OFF OFF OFF ON ON ON ON
16 ON ON ON ON OFF ON ON ON
17 OFF ON ON ON OFF ON ON ON
18 ON OFF ON ON OFF ON ON ON
19 OFF OFF ON ON OFF ON ON ON
20 ON ON OFF ON OFF ON ON ON
21 OFF ON OFF ON OFF ON ON ON
22 ON OFF OFF ON OFF ON ON ON
23 OFF OFF OFF ON OFF ON ON ON
24 ON ON ON OFF OFF ON ON ON
25 OFF ON ON OFF OFF ON ON ON
26 ON OFF ON OFF OFF ON ON ON
27 OFF OFF ON OFF OFF ON ON ON
28 ON ON OFF OFF OFF ON ON ON
29 OFF ON OFF OFF OFF ON ON ON
30 ON OFF OFF OFF OFF ON ON ON
31 OFF OFF OFF OFF OFF ON ON ON
32 ON ON ON ON ON OFF ON ON
NO TE
The preceding table provides the methods for setting addresses 1–32. For details about how
to set addresses 33–247, see the binary DIP switch setting rules.
RMS-MODBUS01A
User Manual 3 Function Description
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. 8

YDN-23 Protocol
NO TICE
When you select the YDN-23 protocol, set toggle switch 4 of the functional DIP
switch S1 to OFF.
The following describes how to set the address DIP switch.
Figure 3-4 RS485 address DIP switch S2
Table 3-5 Description of the RS485 address DIP switch S2
Switch No. Denition DIP Switch Setting
1 Address DIP switch
485_ADDR0
ON: 0
OFF: 1
2 Address DIP switch
485_ADDR1
ON: 0
OFF: 1
3 Address DIP switch
485_ADDR2
ON: 0
OFF: 1
4 Address DIP switch
485_ADDR3
ON: 0
OFF: 1
5 - ON: 0
6 - ON: 0
7 - ON: 0
8 - ON: 0
NO TE
When you select the YDN-23 protocol, set the toggle switches 5–8 of the DIP switch to ON.
RMS-MODBUS01A
User Manual 3 Function Description
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Table 3-6 Mapping between addresses and toggle switches
Address DIP1 DIP2 DIP3 DIP4
1 OFF ON ON ON
2 ON OFF ON ON
3 OFF OFF ON ON
4 ON ON OFF ON
5 OFF ON OFF ON
6 ON OFF OFF ON
7 OFF OFF OFF ON
8 ON ON ON OFF
9 OFF ON ON OFF
10 ON OFF ON OFF
11 OFF OFF ON OFF
12 ON ON OFF OFF
13 OFF ON OFF OFF
14 ON OFF OFF OFF
15 OFF OFF OFF OFF
3.2.2 DIP Switch Setting (02354GLU)
S1 and S2 are address DIP switches for the RS485 port, and S3 and S4 are
functional DIP switches for the RS485 port.
Figure 3-5 DIP switches
RMS-MODBUS01A
User Manual 3 Function Description
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3.2.2.1 Address DIP Switch
Figure 3-6 RS485 address DIP switch S1
Table 3-7 Description of the RS485 address DIP switch S1
Switch No. Denition DIP Switch Setting
1 Address DIP switch
485_ADDR0
ON: 0
OFF: 1
2 Address DIP switch
485_ADDR1
ON: 0
OFF: 1
3 Address DIP switch
485_ADDR2
ON: 0
OFF: 1
4 Address DIP switch
485_ADDR3
ON: 0
OFF: 1
Figure 3-7 RS485 address DIP switch S2
Table 3-8 Description of the RS485 address DIP switch S2
Switch No. Denition DIP Switch Setting
1 Address DIP switch
485_ADDR4
ON: 0
OFF: 1
2 Address DIP switch
485_ADDR5
ON: 0
OFF: 1
RMS-MODBUS01A
User Manual 3 Function Description
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Switch No. Denition DIP Switch Setting
3 Address DIP switch
485_ADDR6
ON: 0
OFF: 1
4 Address DIP switch
485_ADDR7
ON: 0
OFF: 1
You can use the binary method to set the DIP switch. The following lists the
mapping between addresses and toggle switches.
Table 3-9 Mapping between addresses and toggle switches
Addre
ss
DIP1
(S1)
DIP2
(S1)
DIP3
(S1)
DIP4
(S1)
DIP1
(S2)
DIP2
(S2)
DIP3
(S2)
DIP4
(S2)
1 OFF ON ON ON ON ON ON ON
2 ON OFF ON ON ON ON ON ON
3 OFF OFF ON ON ON ON ON ON
4 ON ON OFF ON ON ON ON ON
5 OFF ON OFF ON ON ON ON ON
6 ON OFF OFF ON ON ON ON ON
7 OFF OFF OFF ON ON ON ON ON
8 ON ON ON OFF ON ON ON ON
9 OFF ON ON OFF ON ON ON ON
10 ON OFF ON OFF ON ON ON ON
11 OFF OFF ON OFF ON ON ON ON
12 ON ON OFF OFF ON ON ON ON
13 OFF ON OFF OFF ON ON ON ON
14 ON OFF OFF OFF ON ON ON ON
15 OFF OFF OFF OFF ON ON ON ON
16 ON ON ON ON OFF ON ON ON
17 OFF ON ON ON OFF ON ON ON
18 ON OFF ON ON OFF ON ON ON
19 OFF OFF ON ON OFF ON ON ON
20 ON ON OFF ON OFF ON ON ON
RMS-MODBUS01A
User Manual 3 Function Description
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Addre
ss
DIP1
(S1)
DIP2
(S1)
DIP3
(S1)
DIP4
(S1)
DIP1
(S2)
DIP2
(S2)
DIP3
(S2)
DIP4
(S2)
21 OFF ON OFF ON OFF ON ON ON
22 ON OFF OFF ON OFF ON ON ON
23 OFF OFF OFF ON OFF ON ON ON
24 ON ON ON OFF OFF ON ON ON
25 OFF ON ON OFF OFF ON ON ON
26 ON OFF ON OFF OFF ON ON ON
27 OFF OFF ON OFF OFF ON ON ON
28 ON ON OFF OFF OFF ON ON ON
29 OFF ON OFF OFF OFF ON ON ON
30 ON OFF OFF OFF OFF ON ON ON
31 OFF OFF OFF OFF OFF ON ON ON
32 ON ON ON ON ON OFF ON ON
NO TE
The preceding table provides the methods for setting addresses 1–32. For details about how
to set addresses 33–247, see the binary DIP switch setting rules. If the address is a value
greater than 247, set the address to 247.
3.2.2.2 Functional DIP Switch
Figure 3-8 RS485 functional DIP switch S3
Table 3-10 Description of the RS485 functional DIP switch S3
Switch No. Denition DIP Switch
Setting
Remarks
1 Reserved ON: 0
OFF: 1
Toggle switches 1,
2, and 3 form a 3-
RMS-MODBUS01A
User Manual 3 Function Description
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. 13

Switch No. Denition DIP Switch
Setting
Remarks
2 bit baud rate DIP
switch. Currently,
the software
version supports
only 9600 bit/s.
(Toggle switches
1, 2, and 3 are set
to ON for this
baud rate.)
Reserved ON: 0
OFF: 1
3 Reserved ON: 0
OFF: 1
4 RS485 protocol
DIP switch
RS485_PROTOCO
L
ON: 0 0: Set toggle
switch 4 of the
functional DIP
switch S3 to ON
to select the
Modbus protocol.
Figure 3-9 RS485 functional DIP switch S4
Table 3-11 Description of the RS485 functional DIP switch S4
Switch No. Denition DIP Switch
Setting
Remarks
1 Toggle switch for
selecting a two-
wire or four-wire
system
ON: two-wire
system
OFF: four-wire
system
Toggle switches 1
and 2 must be set
to the same
status.
2 Toggle switch for
selecting a two-
wire or four-wire
system
3 CAN build-out
resistor toggle
switch
ON: with a build-
out resistor
OFF: without a
build-out resistor
-
RMS-MODBUS01A
User Manual 3 Function Description
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. 14

4 Installation
4.1 Unpacking and Checking
After the RMS-MODBUS01A card is delivered onsite, unpack the package and
check as follows:
● Visually inspect the appearance for shipping damage. If any damage is found,
notify the carrier immediately.
● Check that the ttings comply with the packing list. If any discrepancy is
found, record the information and contact the local oce of the supplier
immediately.
4.2 Installation Preparations
Table 4-1 Installation tools
Appearance, Specications, and Name
Insulated Phillips
screwdriver
Multimeter Label Insulation tape
Electrician's knife Protective gloves ESD gloves Cable tie
RMS-MODBUS01A
User Manual 4 Installation
Issue 05 (2021-11-18) Copyright © Huawei Technologies Co., Ltd. 15