Panasonic FP2 User Manual

Also see for FP2 Series: Programming manual Product manual Manual Technical manual Technical manual

Contents

Panasonic FP2 User Manual Manual pdf 31 page image

Confirming the Unit Settings and Design ContentsFP2 Serial Data Unit3 − 33.1 Signals of RS232C Connector3.1 Signals of RS232C ConnectorRS232CRS232 is a set of serial communication standards compiled by the EIA (ElectronicsIndustry Association). Originally, RS232 served as an interface for connecting personalcomputers, modems, and other devices, but currently it is widely used as ageneral−purpose interface for PLCs and other control devices. Most commonly, it isused as a 25−pin or 9−pin D−Sub connector, and the purposes and timings of thevarious signal lines are regulated by the standards.Pin layoutPin No. Name Abbrev. Signal direction1 Protective ground FG —2 Sent data SD Unit → External device3 Received data RD Unit ← External device4 Request to send RS Unit → External device5 Clear to send CS Unit ← External device6 Not used — —7 Signal ground SG —8 Received line signal detector CD Unit ← External device9 Data terminal ready ER Unit → External deviceFG (Protective ground)With the serial data unit, this is connected to the FG terminal of the power supply unitthrough the FP2 backplane, along with the D sub−connector housing.SD (Sent data)This is the signal line used when data is sent to the other side. With the serial data unit,the SD (green) LED of the operation status display LED blinks when data is being sentnormally.RD (Received data)This is the signal line used when data is received from the other side. With the serialdata unit, the RD (green) LED of the operation status display LED blinks when data isbeing received normally.RS (Request to send)This is the signal line that requests data to be sent from the other side.With the serial data unit, the RS signal is normally on.CS (Clear to send)This signal line is on when data can be received by the other device. With the serial dataunit, data cannot be sent until an on signal is received from the other device. If this signalline is not connected to the other device, it should be connected to the RS (Request toSend) of the serial data unit.SG (Signal ground)This signal line provides a common reference potential for the various mated circuitsconnected to each other in the serial data unit and peripheral devices.123456789(9 pins)