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20
B R A N C H C I R C U I T M O N I T O R I N G I N S TA L L AT I O N A N D C O M M I S S I O N I N G I N S T R U C T I O N S
—
ASPMETER split core
Configuration
1. Communications configuration: Communications
parameters for the ASPMETER series are field-selectable
for your convenience. Please see the product diagrams
section (page 17) for selector location. The following
parameters are configurable:
• Baud rate: 9600, 19200 or 38400
• Parity: on or off
• Parity: odd or even
• Wiring: two or four
ON
Example: 2-wire 19200 baud, no parity (default only)
ON
ON
ON
1
2
3
4
1
2
3
4
BØ
B1
Odd/
Off/
1
2
3
4
1
2
3
4
On
Even
Parity
Parity
BØ
B1
Odd/
Off/
On
Even
Wire
BØ
B1
Odd/
Off/
Parity
Parity
BØ
B1
Odd/
Off/
On
Even
On
Even
Parity
Parity
Parity
Parity
1
2
3
4
Off
Off
On
Off
Off
On
On
On
Off
Off
On
Off
Off
On
On
On
2. Address configuration: Each Modbus device on a single
network must have a unique address. Set the switch block
to assign a unique address before the device is connected
to the Modbus RS-485 network. If an address that conflicts
with that of another is selected, neither device will be able
to communicate.
5
6
7
8
5
6
7
8
2/4
Reserved
5
6
7
8
5
6
7
8
Wire
2/4
Reserved
2/4
Reserved
2/4
Reserved
Wire
Wire
5
6
7
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Odd parity
X
X
X
X
X
X
Even parity
On
X
X
X
4-wire RS-485
2-wire RS-485
Off
X
X
X
3. The ASPMETER uses two logical addresses. Panel 1 uses
the base address as set on the DIP switches, and panel 2
uses this base address + 1. Address the ASPMETER as any
ON
whole number between and including 1–246. Each unit is
equipped with a set of eight DIP switches for addressing.
ON
See below.
LSB
ON
1
ON
LSB
1
1
LSB
LSB
1
1
1
1
1
4. To determine an address, simply add the values of any
switch that is on. For example:
ON
ON
LSB
ON
1
ON
LSB
1
LSB
LSB
1
1
Switch number 4 has an ON value of 8 and switch number 6
has an ON value of 32. (8 + 32 = 40). Therefore, the address
for panel 1 is 40 and the address for panel 2 is 41. See the
address setup section (page 21) for a pictorial listing of
9600
the first 63 switch positions.
19200
38400
Default DIP switch settings
Reserved
No parity
The ASPMETER includes two DIP switches, as shown below.
Switches are shown in their default positions.
No parity
Comms Address
2
3
4
5
6
7
2
4
8
16
32
2
3
4
5
6
7
2
3
4
5
6
7
2
4
8
16
32
64
2
3
4
5
6
7
2
4
8
16
32
2
4
8
16
32
64
2
3
4
5
6
7
2
3
4
5
6
7
2
3
4
5
6
2
3
4
5
6
7
Comms Settings
1
=
1
=
MSB
1
8
1
=
=
MSB
DIP Switch
64
128
8
Values
MSB
MSB
DIP Switch
8
128
8
Values
DIP Switch
64
128
DIP Switch
128
Values
Values
40
=
40
=
MSB
40
8
40
=
=
MSB
8
MSB
MSB
7
8
8
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