E6581440
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5. Mailbox Function Points
Mail box object allow to read/write inverter parameters via BACnet® network.
Object ID
Object Name
Description
Analog value
#25 MBOX PARAM
Set parameter individual communication number.
Communication address is normally consist of characters from 0 to 9, but
Interpreted hexadecimal code internally. Set the real float number
converted hexadecimal code to decimal code.
Type of present-value is a BACnet
®
real number.
Analog value
#26 MBOX DATA
Set parameter value to read/write. The data unit is depend on the
parameter specification. Refer to the inverter instruction manual and the
communication function manual (E6581413).
Type of present-value is a BACnet
®
real number.
Binary value
#15 MBOX READ
Read command
If MBOX READ command value is set to “1”, the parameter specified by
MBOX PARAM is read from the inverter to MBOX DATA, and MBOX
READ value is cleared to “0” automatically.
If parameter reading is denied or specified communication number is
illegal, MBOX READ value remains “1”. It allow to check read failure.
Binary value
#16 MBOX WRITE
Write Command
If MBOX WRITE command value is set to “1”, the inverter parameter
specified by MBOX PARAM is written the data specified by MBOX DATA,
and MBOX WRITE set to “0” automatically.
If parameter writing is denied or specified communication number is illegal,
MBOX WRITE value remains “1”. It allow to check write failure.
Example Read:
Read acceleration time.(
acc
Communication number is 0010 )
a) In order to set MBOX PARAM=0010H, Set “16.0” to Analog value #25.
b) Set “1” to Binary value #15(MBOX READ).
c) Wait until Binary value #15 is cleared to “0”.
d) Read the data from Analog value #26(MBOX DATA).
If read value is “100.0”, it means 10.0[sec].
Example Write:
Write deceleration time.(
dec
Communication number is 0011 )
a) In order to set MBOX PARAM=0011H, Set “17.0” to Analog value #25.
b) In order to set MBOX DATA =12.3[sec], Set “123.0” to Analog value #26.
c) Set “1” to Binary value #16(
MBOX WRITE
).
d) Wait until Binary value #16 is cleared to “0”.
Do not write the same parameter to the EEPROM more than 100,000 times. The life time of
EEPROM is approximately 100,000 times.
