Lambda Genesys 750W Technical Manual

Lambda Genesys 750W Technical Manual Manual pdf 60 page image

83-507-013 Rev. A53NOTEThe address (ADR n) command must return an “OK” response beforeany other commands are accepted.7.5.2 Multi power supply connection to RS232 or RS485 busUp to 31 units can be connected (daisy chained) to the RS232 or RS485 bus. The first unit connects tothe controller via RS232 or RS485 and the other units are connected via the RS485 bus.1. First unit connection: Refer to Section 7.5.1 for connecting the first unit to the controller.2. Other units connection: The other units on the bus are connected via their RS485 interface.Refer to Figure 7-5 for typical connection.- Set rear panel setup switch SW1-6 to its UP position.- Using the Linking cable supplied with each unit (refer to Fig. 7-6), connect each unit OUTconnector to the next unit IN connector.7.6 COMMUNICATION INTERFACE PROTOCOL7.6.1 Data formatSerial data format is 8 bit, one start bit and one stop bit. No party bit.7.6.2 AddressingThe Address is sent separately from the command. It is recommended to add 100msec delay betweenquery or sent command to next unit addressing. Refer to Section 7.8.3 for details.7.6.3 End of MessageThe end of message is the Carriage Return character (ASCII 13). The power supply ignores the LineFeed (ASCII 10) character.7.6.4 Command RepeatThe backslash character “\” will cause the last command to be repeated.7.6.5 ChecksumThe user may add a checksum (optional) to the end of the command. The checksum is “$” followed bytwo hex characters. If a command or a query has a checksum, the response will also have one. There isno CR between the command string and the “$” sign.Example: STT?3ASTAT?$7B7.6.6 AcknowledgeThe power supply acknowledges received commands by returning an “OK” message. If an error is de-tected the power supply will return an error message. The rules of checksum also apply to the acknowl-edge.IN OUTPOWER SUPPLY#1IN OUTPOWER SUPPLY#2IN OUTPOWER SUPPLY#3IN OUTPOWER SUPPLY#31RS232/RS485 RS485 RS485 RS485Fig7-5: Multiple power supply RS232/485 connection81181635416354PIN NO.HOUSING HOUSINGPIN NO.NAME NAMESHIELDSGTXDTXDRXDRXDSHIELDSGRXDRXDTXDTXD-++++---Serial link cable with RJ-45 shielded connectors (P/N: GEN/RJ-45)Fig.7-6:L=0.5m typ.