Errors Related To The Serial Communication; Times For Read/Write Of Telegrams - WEG CFW-09 User Manual

CHAPTER 8 - CFW-09 OPTIONS AND ACCESSORIES
8.13.5.4 Errors Related to the
Serial Communication
8.13.6 Times for Read/Write
of Telegrams
MASTER
INVERTER
312
They act as follows:
They do not disable the inverter;
They do not disable defective relays;
They are informed in the word the logical status.
Fault Types
-E22: longitudinal parity fault;
-E24: parameterization fault (when some situation occurs as indicated in
table 4.2. (parameter incompatibility), - chapter 4 - Keypad (HMI)
Operation, or when there is a parameter change attempt that cannot
be changed with running motor;
-E25: variable or parameter not existing;
-E26: expected value out of the allowed limits;
-E27: writing attempt in a read only variable or logical control disabled;
-E28: Serial communication is inactive. If the time programmed at P314
has elapsed without the inverter receiving a valid Modbus telegram,
this is displayed by the HMI and the inverter adopts the action
programmed at P313.
NOTE!
If a parity fault is detected during inverter data reception, the telegram will be
ignored.
The same happens when syntax errors occur.
Ex.:
- Code values different from the numbers 0 to 9;
- Separation character different from " =", etc.
Tx: (data)
TxD: (data)
RSND (request to send)
t
t
di
proc
T
proc
T
di
T
t xi
t
txi
Time (ms) Typical
10
5
reading 15
writing 3