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5. Mailbox Function Points
Mail box object allow to read/write inverter parameters via BACnet ® network.
Object ID
Analog value
#25
Analog value
#26
Binary value
#15
Binary value
#16
Example Read:
Read acceleration time.(
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.(
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(
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.
Object Name
Description
Set parameter individual communication number.
Communication address is normally consist of characters from 0 to 9, but
MBOX PARAM
Interpreted hexadecimal code internally. Set the real float number
converted hexadecimal code to decimal code.
Type of present-value is a BACnet
Set parameter value to read/write. The data unit is depend on the
parameter specification. Refer to the inverter instruction manual and the
MBOX DATA
communication function manual (E6581413).
Type of present-value is a BACnet
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
MBOX READ
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.
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,
MBOX WRITE
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.
acc
dec
®
®
Communication number is 0010 )
Communication number is 0011 )
).
MBOX WRITE
- 16 -
E6581440
real number.
real number.
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