
B--65245EN/02
4. DIRECT COMMANDSHANDLING
113
DWORD type
#7 #6 #5 #4 #3 #2 #1 #0
Xx+4 Control flag 2
Xx+5 00100000
(0x20)
Xx+6 Reserved Execution result
Xx+7 Data length (byte type ) = 4
Xx+8 Parameter (DWORD type)
Xx+9 Parameter (DWORD type)
Xx+10 Parameter (DWORD type)
Xx+11 Parameter (DWORD type)
(2) Writing parameters
The host can write parameters for the servo amplifier unit.
CAUTION
1 Writing parameters from the host is prohibited while the
servo amplifier unit is operating.
2 There is a limit to the number of writes to the memory
(EEPROM) in the ϒamplifier that is used to store parameter
settings (tens of thousands of writes).
For this reason, the direct command, parameter rewrite
instruction, cannot be used for applications that frequently
change parameters. It is, however, possible to frequently
change parameters if the parameter setting is such that only
the data on the RAM is changed without writes to the
EEPROM (NEPRM (bit 3 of parameter No. 004) = 1).
If the number of parameter rewrites exceed the limit, any
subsequent writes to the memory are prohibited, possibly
causing an alarm (LED display: “8”).
Byte type
#7 #6 #5 #4 #3 #2 #1 #0
Yy+4 Control flag 1
Yy+5 00100001
(0x21)
Yy+6 Parameter No. (word type)
Yy+7 Parameter No. (word type)
Yy+8 00000001
Yy+9 Data length (byte type) = 1
Yy+10 Parameter (byte type)
D Instruction command
format