15
Technical Data
MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON
www.eaton.com
8 string monitoring units
Interface parameters
The type S1 string monitoring module PVCBM-GR8 supports the
modbus RTU protocol with the following interface parameters:
Baud rate
19.2 …115.2 Kb/s
Format
8n1, 8e1 or 8o1
Maximum cable length
1.2km
Unit Load
1/8
Byte order
MSbit-LSBit
Word order
LSByte-MSByte
Address range
1 – 247
Max. frame length
256 bytes
The following function codes are supported:
03
Read contents of a holding register
04
Read contents of an input register
06
Write contents of a R/W register (preset single register)
For reading the registers it holds:
Address basis
Function code
for reading
Function code
for writing
Input register
30001
0x04
-
Holding register
40001
0x03
0x06
List of registers and functions
Abbreviations used
Explanation
UINT16
Data type unsigned integer. 16 bit
UINT32
Data type unsigned integer. 32 bit
Float32
Data type float, 32 bit
R
Only read access possible (read only)
R/W
Read and write access possible (read/write)
Register
(integer)
Data
type
Channel (descrip-
tion)
Possible values
Unit
R/W
0000
UINT16
Digital input 01 (Main
switch)
0: OFF
1: ON
R
0001
UINT16
Digital input 02 (1000V
DC surge protection
0: NOK
1: OK
R
0003
UINT16
Digital input 03
0, 1
R
0004, 0005
Float32
Current I
1
-20.00 … +20.00
A
R
0006, 0007
Float32
Current I
2
-20.00 … +20.00
A
R
0008, 0009
Float32
Current I
3
-20.00 … +20.00
A
R
0010, 0011
Float32
Current I
4
-20.00 … +20.00
A
R
0012, 0013
Float32
Current I
5
-20.00 … +20.00
A
R
0014, 0015
Float32
Current I
6
-20.00 … +20.00
A
R
0016, 0017
Float32
Current I
7
-20.00 … +20.00
A
R
0018, 0019
Float32
Current I
8
-20.00 … +20.00
A
R
0020, 0021
Float 32
Voltage
0 … 1000.0
V
R
0028, 0029
Float32
Power
0 … 160000
W
R
0036, 0037
Float32
Temperature 1
-40.0 … +160.0
°C
R
0038, 0039
Float32
Temperature 2
-40.0 … +160.0
°C
R
0042, 0043
Float32
Total current
-160.00 … +160.00 A
R
0044, 0045
UINT32
Date of the firmware
0xDDMMYYYY
Example:
0x040507DB
04.05.2011
R
0046, 0047
UINT32
Software version
0xBBBBMMNN
Example:
0x12510102
V1.02.1251
R
0048
UINT16
Error code
1: OK
≠1: NOK
R
Register
(integer)
Data
type
Channel (descrip-
tion)
Possible values
Unit
R/W
0059
UINT16
Sync ID
1)
User code of reg.
0302
R
0060, 0061
Float32
Sync_current I
1
1)
-20.00 … +20.00
A
R
0062, 0063
Float32
Sync_current I
2
-20.00 … +20.00
A
R
0064, 0065
Float32
Sync_current I
3
-20.00 … +20.00
A
R
0066, 0067
Float32
Sync_current I
4
-20.00 … +20.00
A
R
0068, 0069
Float32
Sync_current I
5
-20.00 … +20.00
A
R
0070, 0071
Float32
Sync_current I
6
-20.00 … +20.00
A
R
0072, 0073
Float32
Sync_current I
7
-20.00 … +20.00
A
R
0074, 0075
Float32
Sync_current I
8
-20.00 … +20.00
A
R
0076, 0077
Float32
Sync_voltage
0 … 1000.0
V
R
0078, 0079
Float32
Sync_power
0 … 160000
W
R
0080, 0081
Float32
Sync_temperature 1
-40.0 … +160.0
°C
R
0082, 0083
Float32
Sync_temperature 2
-40.0 … +160.0
°C
R
0084, 0085
Float32
Sync_total_current
-160.00 … +160.00 A
R
0099
UINT16
Relay status
0: OFF
1: ON
R/W
0200
UINT16
Device ID
e.g. 2005
R
0202
UINT16
Serial number low
e.g. 14148
R
0203
UINT16
Serial number high
e.g. 4
R
0205
UINT16
Modbus address
1 … 254
R/W
0206
UINT16
Type of current mea-
surement
1)
0: OFF (Factory
setting)
1: Fast, 20ms
0208
UINT16
Response delay in ms
3)
0 … 250
R/W
0300
UINT16
EcoMode
4)
0: OFF (Factory
setting)
1: ON
R/W
0302
UINT16
Sync register
1)
User code
Write: Trigger sync
R/W
Setting
Specified value (decimal)
No parity (8n1)
0 … 5
Even parity (8e1)
100 … 105
Odd parity (8o1)
200 … 205
1200Bd
0 | 100 | 200
2400Bd
1 | 101 | 201
4800Bd
2 | 102 | 202
9600Bd
3 | 103 | 203
19.2kBd
4 | 104 | 204
38.4kBd
5 | 105 | 205
