using the E500 series drives General This data sheet describes the correct techniques for using E500 series inverters on a standard RS485 serial comms link. Up to 32 inverters may be connected. Max comms speed is 19200 Baud. More information can be found in the E500 instruction manual The can be used for communication operation from a personal computer etc. When the is connected with a personal, FA or other computer by a communication cable, a user program allows the inverter to be run and monitored and the parameter values to be read and written. pin-outs Viewed from the inverter (receptacle side) front 8) to 1) 1) SG 2) P5S 3) RDA 4) SDB 5) SDA 6) RDB 7) SG 8) P5S Note: 1. Do not connect the to a computer's LAN board, FAX modem socket or telephone modular connector. Otherwise, the product may be damaged due to electrical specification differences. 2. Pins 2) and 8) (P5S) provide power to the control panel or parameter unit. Do not use these pins for communication. 1. with interface used with several inverters Station 2 Station n Interface / Distribution 10BASE-T cable Termination resistor Title: with E500 s Page 1 of 5
2. When a computer having a RS-232C interface is used with inverters RS-232C connector RS-232C cable Max. 15m Converter* Distribution 10BASE-T cable Termination resistor 3. Wiring of one computer and one inverter Side Terminals Signal name RDA RDB SDA SDB RSA RSB CSA CSB SG FG Description Receive data Receive data Send data Send data Request to send Request to send Clear to send Clear to send Signal ground Frame ground Cable connection and signal direction 10 BASE-T Cable (Note 2) 2 0.3mm or more SDA SDB RDA RDB SG 4. Wiring of one computer and "n" inverters (several inverters) Note: 1. There may be the influence of reflection depending on the transmission speed and/or transmission distance. If this reflection hinders communication, provide a termination resistor. If the is used to make a connection, use the distributor as a termination resistor cannot be fitted. Connect the termination resistor to only the inverter remotest from the computer. (Termination resistor: 100Ω) 2. Make connections in accordance with the instruction manual of the computer used. Fully check the numbers of the computer as they differ between models. Title: with E500 s Page 2 of 5
5. Preparation Connection cable... Connector: RJ45 connector Cable: Cable conforming to EIA568 (e.g. 10BASE-T cable) Personal computer, RS-232C converter... To be prepared when the communication port of the personal computer has RS-232C specifications. Parameters Related to serial communications Pr. 117 "station number" Pr. 118 "communication speed" Pr. 119 "stop bit length/data length" Pr. 120 "parity check presence/absence" Pr. 121 "number of communication retries" Pr. 122 "communication check time interval" Pr. 123 "waiting time setting" Pr. 124 "CR, LF presence/absence selection" Used to perform required settings for communication between the inverter and personal computer. Title: with E500 s Page 3 of 5
6. Communication specifications Conforming standard Number of inverters connected 1:N (maximum 32 inverters) Communication speed Selectable between 19200, 9600 and 4800bps Control protocol Asynchronous Communication method Half-duplex Communication Character system ASCII (7 bits/8 bits) selectable specifications Stop bit length Selectable between 1 bit and 2 bits. Terminator CR/LF (presence/absence selectable) Check system Parity check Selectable between presence (even/odd) and absence Sum check Present Waiting time setting Selectable between presence and absence Parameter Number Factory Setting Setting Range 117 0 0 to 31 118 192 48, 96, 192 119 1 Data length 8 0, 1 Data length 7 10, 11 120 2 0, 1, 2 121 1 0 to 10, 9999 122 9999 0 to 999.8 s, 9999 123 9999 0 to 150, 9999 124 1 0, 1, 2 Title: with E500 s Page 4 of 5
7. Setting Parameter Number Name Setting Description 117 Station number 0 to 31 Station number specified for communication from the. Set the inverter station numbers when two or more inverters are connected to one personal computer. 118 Communication 48 4800 baud speed 96 9600 baud 192 19200 baud 119 Stop bit 8 data 0 Stop bit length 1 bit 1 Stop bit length 2 bits 7 bits 10 Stop bit length 1 bit 11 Stop bit length 2 bits 120 Parity check 0 Absent 1 Odd parity present 2 Even parity present 121 Number of communication retries 0 to 10 Set the permissible number of retries at occurrence of a data receive error. If the number of consecutive errors exceeds the permissible value, the inverter will come to an alarm stop. 9999 (65535) If a communication error occurs, the inverter will not come to an alarm stop. At this time, the inverter can be coasted to a stop by MRS or RESET input. During an error, the light fault signal (LF) is given to the open collector output. Allocate the used with any of Pr. 190 to Pr. 192 (multifunction outputs). 122 Communication 0 No communication check time interval 0.1 to 999.8 Set the communication check time [seconds] interval. If a no-communication state persists for longer than the permissible time, the inverter will come to an alarm stop. 9999 Communication check suspension 123 Waiting time setting 0 to 150 Set the waiting time between data transmission to the inverter and response. 9999 Set with communication data. 124 CR, LF 0 Without CR/LF instruction presence/ 1 With CR, without LF absence 2 With CR/LF Title: with E500 s Page 5 of 5