Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Chapter III General Description of Function Block
SR series adopt the programming methods by the use of function blocks. In
total 8 general function blocks, 14 special function blocks and 8 input & output
function blocks are configured. And each block can achieve a specific control function
independently, e.g. TOND, TOFD, SBPL, SBPL, SCHD, etc. As several blocks are
linked up in a specific way relatively complicated control functions can be realized.
Programming with function blocks is simpler and better appreciated than the
conventional PLC instruction programming.
The following types of operator for FAB function blocks are available for
options:
1
£®
Options of input ports: IA0~IA7, IB0~IB5 (input ports of 22-point machine),
IC0~IC7, ID0~ID5 (input ports of extension module 1), IE0~IE7, IF0~IF5
(input ports of extension module 2), IG0~IG7, IH0~IH5 (input ports of
extension module 3), II0~II7, IJ0~IJ5 (input ports of extension module 4),
IK0~IK7, IL0~IL5 (input ports of extension module 5), M00
—
M99,
N00
—
N99 (intermediate relay), V00~V99 (virtual keys), HI (high potential
status), LO (low potential status), X (no input connection), telephone two-tone
pulse: P00--P99.
2
£®
Options of output ports: QA0~QA7 (output ports of the machine), QC0~QC7
(output ports of extension module 1), QE0~QE7 (output ports of extension
module 2), QG0~QG7 (output ports of extension module 3), QI0~QI7 (output
ports of extension module 4), QK0~QK7 (output ports of extension module 5),
M00
—
M99, N00
—
N99 (intermediate relay)
3.1 General Function Blocks (GF)
There are 8 general function blocks in total as listed in the following table:
Table 1: General Function Blocks
Line Diagram SR Function Block Function
Series connection
Of NO contacts
AND
Series connection of
NO contacts with
RLO borderline test
AND
(With RLO borderline
test)
