18
Technical Data
MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON
www.eaton.com
Register
(integer)
Data
type
Channel (descrip-
tion)
Possible values
Unit
R/W
0208
UINT16
Response delay in
ms
3)
0 … 250
R/W
0209
UINT16
Baud rate and parity
For values refer to
table below
R/W
0300
UINT16
EcoMode
4)
0: OFF (Factory set-
ting) 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
For even parity and a baud rate of 9600 Bd enter 103 as the value.
The number of stop bits cannot be changed (always 1). The factory
setting is: no parity, 19.2 kBd
Advanced configuration options
To adapt the type S1 string monitoring module optimally to your
needs, you can use several parameters to control the behavior.
The following table provides an overview of the available options.
Mode
Property
Explanation
Register
Measurement modes
Default
Low noise, good noise suppression
The values are written into the registers every second. Due to the longer measurement
time, however, the response time of the modbus communication is about 20ms.
206 = 0
Fast
High measuring rates
The values are written into the registers every 100ms.
206 = 1
Operating modes
Default
Fast measuring value update
The type S1 string monitoring module is permanently and fully operational. Power con-
sumption 1.4W.
300 = 0
Eco
Minimal power consumption, power sup-
ply possible from PV system
The metrological part is turned on only once per minute to perform the measurement and
write the values into the registers. The display backlight is switched off. The communica-
tion part is permanently active. Power consumption 0.1W.
300 = 1
Data collection modes
Default
Simple communication
With several type S1 string monitoring modules on one bus, the data are collected
sequentially, i.e. with a time lag.
-
Sync
Synchronous measured values from all
modules in the system
In the synchronized mode, the controller sends a broadcast value to all modules (register
302) these store the current measured values simultaneously in special registers. Then
the values are transmitted sequentially. Thus, all values will be collected simultaneously
even in large systems.
302
Delay
Default
Short response times
Requests from the bus master will be answered as quickly as possible.
-
Delayed
Adaptation to PLC reaction time
Requests from the bus master will be answered only after the specified time.
208
You can carry out the measurement of the input currents and the
total voltage in two different ways:
1. In the default setting all the inputs are measured over about one
second (1000 ms) and this value is transferred to the registers.
Due to this relatively long measuring time, over which averaging
of the individual measurements of the ND converter occurs, the
noise content in the signal is low and you obtain good interfer-
ence suppression.
2. In the Fast mode (register 206 = 1) measurement takes place
only over about 100 ms (milliseconds). This means that you
obtain a high sample rate or refresh rate and the reaction time
on the Modbus interface (Response delay, refer also to Section
5.4.4) is reduced from approx. 20 ms to approx. 5 to 8 ms .
