Yaskawa MP940 - Manual (Page 184)

System Startup
5.2.1 MP940 Module
5-12
LED Indicator Specifications
The following table shows the 260IF LED indicator specifications.
Table 5.1 LED Indicator Specifications
∗ 1. The offline status indicates the status during the time from when the
LED indicator test has been completed immediately after startup, until
the MAC ID overlapping check has been completed (approx. 2 s). The
online status indicates the status after the MAC ID overlapping check.
∗ 2. If the error is caused by a disconnected network power supply, Auto-
matic Reset is activated even when a DeviceNet bus off error occurs.
NS lights red momentarily, and then turns OFF immediately. After the
power supply of the network has been recovered, NS flashes green.
Immediately after the power supply has been turned ON, the MS and NS LED indicators
will be tested for 1 second according to DeviceNet specifications. The status displayed by
this operation is shown in the following flowchart.
Fig 5.2 Display during LED Indicator Test
Name
Indicator
Color
Status Meaning
MS Red/Green Unlit Power not supplied to the Module
Lit green Operating normally.
Lit red Self-diagnosis error/WDT error
NS Red/Green Unlit Power not supplied/Module is offline *1
Flashing green Module is online, but connection cannot be con-
firmed.
Lit green Module is online and connection is confirmed.
Flashing red DeviceNet not communicating
Lit red Communications not possible (MAC ID over-
lapped)/Bus OFF error
WDT error
*2
NS MS
Unlit Unlit
Unlit
Unlit
Unlit
Green
Red
0.25 s
0.25 s
0.25 s
0.25 s
Green Green
Red Green
Green
Power supply is OFF.
Module
startup
LED indicator test starts.
1 s
LED indicator test completed