Numeric I/O Expansion And I/O Channel Mapping - FATEK FBS Series Manual

3.1.2 Numeric I/O Expansion and I/O Channel Mapping

The numeric I/O in FBs-PLC treat 16 single-bit data as one 16-bit numeric data (Word) ranging from the 0~65535.
Since all numeric data of FBs-PLC are stored in the register inside PLC (16-bit width), therefore numeric I/O is also
called register I/O. The Input Register (IR) has 64 Word (R3840 ~ R3903) for inputs from external numeric input (NI)
module, and the Output Register (OR) also has 64 Word (R3904 ~ R3967) for outputs to external numeric output (NO)
module.
Analog Input Module, Temperature Module, and Thumbwheel switch multiplex input module are of Numeric input (NI)
modules which use input register (IR) to convey the status. Analog Output Module, 7 Segments Display Module are of
Numeric output (NO) modules which output is directly from the Output register (OR). The Analog Input, Temperature
Input, and Analog Output is of analog voltage or current, while the Thumbwheel switch Input or 7 Segments Display
Output uses user-friendly BCD number signal. Either the magnitude of voltage or current or the value of BCD number is
represented by the 16-bit value of the corresponding register. The corresponding current/voltage signal or BCD value of
any IR or OR on the NI/O module is named as a Channel (CH). The channels on the NI module are called numeric
input channels (NI channels) and those on NO module numeric output channels (NO channels). The number of IR/OR
used by NI and NO channels on each module varies depending on the module type or working mode. The following
table lists the numbers of IR and OR used by NI and NO channels on each NI/O module:
NI/O
Module Name
FBs-6AD
FBs-2DA
FBs-4DA
FBs-4A2D
FBs-32DGI
FBs-7SG1
FBs-7SG2
FB -TC2
S
FBs-TC6/RTD6
FBs-TC16/RTD16
NI Channel NO Channel
Label Label
CH0
CH1
CH2
CH3
CH4
CH5
CH0
CH1
CH0
CH1
CH2
CH3
CH0
CH1
CH2
CH3
CH0
CH1
Unlabeled
CH0
CH0
CH1
Unlabeled
Unlabeled
Number of IR Number of OR
occupied occupied
(Word) (Word)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
3(D)
4(ND)
3(D)
4(ND)
2(D)
4(ND)
1
1
1
H3 -3
Note
1 CH only
D：decode mode
ND：non-decode mode
1 CH only
1 CH only
1 CH only