TECO SG2 Series - Chapter 5: Function Block Diagram Programming; FBD Fundamentals and Logic Blocks

Chapter 4 Relay Ladder Logic Programming 75
Data Link/Remote I/O Instruction (SG2-20Vxx Models Only)
The SG2-20Vxxx transistor output models include the capability to link additional SG2-20Vxx units via the RS-485
connection terminals.
Up to 8 additional SG2 units can be configured as independent Slave nodes, each running their own logic
program and their I/O linked to one Master smart relay.
Up to 2 additional SG2 units can be configured as Remote I/O nodes, and linked to one Master smart relay.
Symbol Description
Selectable Points Range
c
Mode setting (1, 2) 1:sending 2:receiving
Inputs
I1-IC / i1-iC
d
Set the send/receive points(1-8)
Outputs
Q1-Q8 / q1-q8
e
Set the send/receive points
Auxiliar y coil
M1-MF / m1-mF
f
Send/receive memory list location
Expansion inputs
X1-XC /x1-xC
g
I/O link output terminal (L1-L8)
Expansion outputs
Y1-YC / y1-yC
Note: Only one “Mode 1 Send” Data Link instruction (L1-L8) is allowed per
Master
smart relay. All other Data Link instructions must be “Mode 2 Receive”
instructions.
ID Memor y List Location
0
W1~W8
1
W9~W16
2
W17~W24
3
W25~W32
4
W33~W40
5
W41~W48
6
W49~W56
7
W57~W64
The Mode 2 Receive memory range is determined by the Controller ID. Each
controller ID is allocated a range of 8 I/O points (Wx-Wx) that can be read into the
Master smart relay using a DataLink instruction. The adjacent table show the
memory range of Wx locations associated with each controller ID.
The Data Link instruction below is setup for Mode 1 Send where the Master smart relay
is sending 5 I/O points of Inputs to each connected Slave smart relay. The starting Input
is I03 with the resulting range of 5 sending inputs equal to I3 – I7.