Software functions
7-6
7.1.1.7 MAC address
The MAC address of the Ethernet port can be checked.
Modbus/TCP address
Description
Memory address
Offset address
30297 296
H
30298 297
M
30299 298
L
7.1.1.8 Latest error code/Latest error occurrence ID
It is possible to check the latest error code and target ID that the B2G78-E1 detected.
Modbus/TCP address
Description
Memory address
Offset address
30307
306
Latest error code
30308
307
Latest error occurrence ID
The latest error code list is as follows: Some information is redundant in other error diagnoses.
Error code
Name
Error occurrence
ID
Countermeasures taken by customer
DEC
HEX
200 C8 Transmission
power supply
voltage drop error
As this error is not
dependent on
individual slave
units, the
"0x0FFF" value is
stored.
The cause may be insufficient voltage of the
external power supply. Perform the following:
Adjust the voltage of the external power supply
to lie within the rated range (21.6 to 27.6V).
(Recommended voltage is 26.4V.)
Check that the power line (24V, 0V) is not
disconnected or short-circuited. Check that the
pin assignment was correct when the link
connector was crimped.
Check that external power supply is correctly
connected to the terminal block. Also check
that there are no short-circuits, miswiring, or
insufficient tightening of screws.
201 C9 DP-DN
short-circuit error
As this error is not
dependent on
individual slave
units, the
"0x0FFF" value is
stored.
The transmission lines (DP-DN) may be
short-circuited or a current exceeding the
maximum allowable supply current may be
flowing through them. Perform the following:
Check that the transmission line is not
short-circuited. Check that the pin assignment
was correct when the link connector was
crimped.
In addition, check the contact of each
transmission line and that there is no improper
wiring in the terminal wiring.
Modify the cable (line diameter and total
length) and units (type and number of units
connected) so that the consumption current of
all slave units does not exceed the supply
current.
