ABB ACS 800 Series, Firmware Manual

Page: 121 / 340

Program features
121
Start high logic
Warning START HIGH (FFB3) may be caused by the following conditions:
• Prevention of start during power-on sequence. The Crane control program
includes prevention of the crane start when the mains power is switched on. If the
crane start signal is TRUE during mains power switch-on, the drive indicates
warning
START HIGH (FFB3) . Change the crane start signal to zero and give a
new crane start command.
• Use of fieldbus control bits in the wrong order. For more information, see section
Start/Stop sequence using communication bits on page 254 .
Diagnostics
Watchdog function
This function supervises the below-mentioned fault and alarm conditions and
generates a WATCH DOG BIT-N bit, which can be used for safety or emergency
interlocks. The drive is healthy when the bit is active (value = 1). When any of the
fault or alarm conditions get activated, the bit becomes inactive (value = 0). The fault
and alarm conditions used to generate the WATCH DOG BIT-N are listed below.
1. CPU HEALTHY
2. EXTERNAL FAULT (3.06 bit 8)
3. M_F COMM ERROR (3.3 bit 13)
4. BR OVER TEMP (3.17 bit 3)
5. BC OVER TEMP (3.17 bit 4)
6. BC SHORT CIRC (3.17 bit 2)
7. FB COMM ERROR (3.6 bit 12)
Diagnostics
Actual signal Additional information
03.32 bit 14 START HIGH (FFB3): Crane start signal high when switching power ON or
starting against end limit logic sensor high
Actual signal Additional information
03.32 bit 11 WATCH DOG-N active (bit = 0)