Yaskawa Microtrac Gateway to Square D Sy/MAX Family of PLCs for use with Microtrac LAN User Manual

Page 9

4/12/94

OPERATION

Remote Display Controller Input (RDCI) and Get Numeric (GETN)

Numeric Inputs (NUMI) to a PAC schematic from a PLC is illustrated in
Figure 4.

Each PAC block requires a node number and a channel number.

The node number will usually be 200.

The channel number will be in decimal notation. The associated interfaced
PLC register is the PAC channel number plus 3500. For example:

Channel 13 = PLC Gateway Register 13 = PLC Register 3513
Channel 1 = PLC Gateway Register 1 = PLC Register 3501

No subchannel number is required.

A decimal point location parameter is required.

GETN and RDCI PAC blocks behave identically as far as the PLC is
concerned. The GETN and RDCI blocks are used for parameter entry. The
source for data entry for these blocks can come from any number of devices,
including the PLC. The other devices include the Local Control DIsplay Unit
(LCDU), the Portable Control Display Unit (PCDU), the Remote Display Unit
(RDU), and a Supervisory Communication And Data Acquisition (SCADA)
computer. If any source device changes the value of the parameter, the other
devices are updated with the changed value.

GETN and RDCI dataflow between a PAC schematic and a PLC is illustrated
in Figure 5.

The node number is usually 200.

Figure 4.

PLC to PAC Numeric Input

PAC BLOCK

PLC GATEWAY

PLC LADDER LOGIC

NUMI

WRITE

ARCNET

CABLE

SY/LINK

COMM

CABLE

3513

NODE: 200

CHAN: 13

ROUTE: 10

ROUTE: 110

Remote Display
Controller Input

(RDCI)

and Get

Numeric

(GETN)

RD 914-10