User manual
Toolbox 32 User Manual 1.47d www.cse-semaphore.com/mykingfisher
Page
244
RTU Data - IO Modules
Data for the following IO Modules is detailed below: AI-1/4, AI-10, AO-2/3, DI-1, DI-5, DI-10, DO-1, DO-2/5/6,
IO-2, IO-3, IO-4, LP-1/2/3, PC-1, PS-10/11/20/21, PSU-1/PS-1 and RT-1.
To read data from or write data to each IO module, the module's slot address (or position on the backplane)
must be known.
A Kingfisher RTU can have up to 64 modules, all installed on backplane(s). If two or more backplanes are
required, they are linked together using data cables. An RTU can have up to four racks of 16 modules each.
The rack number is set using switches on the backplane. A module’s slot address can be determined from
the type of backplane and the rack number (1-4) of the backplane as illustrated below.
BA
-
6
(
6 Slot
)
RACK 1
1
6
12
SLOT
BA
-
12
(12 Slot)
BA
-
6
RACK 2
17
22
28
SLOT
BA
-
6
RACK 3
33
38
44
SLOT
BA
-
6
RACK 4
49
54
60
SLOT
BA
-
4/40
13
16
29
32
45
48
61
64
BA
-
12
BA
-
12
BA
-
12
BA
-
4/40
BA-4/40
BA
-
4/40
(4 Slot)
If Toolbox is able to communicate with the RTU, the slot addresses of all the modules in the RTU can be
viewed from the Hardware Overview (View, Hardware Overview).
Most IO modules have eight internal 16-bit registers for storing their inputs and outputs. An RTU can have
four types of inputs or outputs:
• Digital input: an open or closed contact switched into the RTU (stored as a single bit in a register)
• Digital output: an open or closed relay switched out of the RTU (stored as a single bit in a register)
• Analog input: a 0-20mA or 4-20mA variable current (or voltage) into the RTU (stored as one input per
register)
• Analog output: a 0-20mA or 4-20mA variable current (or voltage) out of the RTU (stored as one output
per register)
When an IO module is installed on the backplane, it is automatically detected and scanned by the RTU.
Some modules have a combination of input and output types and are called Multi-IO modules. Multi-IO
modules use their 8 internal registers for both analog and digital values. The first register is used for the
digital channels and the other registers (registers 2 to 7) are used for the analog channels. Therefore, to read
the first analog channel from a multi IO module, the second internal register must be read (eg. the first
analog input channel for an IO-3 in slot 14 is #AI14.2).