ABB 3BSE004802R0001 SB171 Counter module

The system recognizes blocking of the N8 channel in online mode once the link to the AS has been established. This type of blocking, which can occur after a faulty message (from a computer, for example) is automatically removed and a MEL message sent to the OS for logging. This message is used for troubleshooting. An example of the structure of this message is shown below.

System alarms initiated by the operational central unit are normally issued via 

– power supply signalling logic ML1 

– cabinet lamp 

– monitor 

– printer

 – bus

Fault processing is initiated 

by an error occuring in a function block algorithm. Function algorithm execution is aborted if a serious fault occurs. A fault which has not yet been registered is entered in the alarm list (SL.@LTM) and in a cyclic buffer (SL.@SDP); from there it is retrieved for logging. If the alarm has already been entered in the alarm list, fault processing is interrupted (until the message is released – QF...;). The alarm list can hold up to 50 to 256 alarms (the maximum value is configurable via GA.ORPA.39). A separate I&C alarm (SYST@LTM S371/372) is generated when the list is 80% full and when the last free location has been reached. Due to the I&C alarm structure several blocks may generate the same error number.

The individual system alarms are structured

 in the format defined according to the stored fault addresses and, together with date and time, entered in the cyclic buffer (up to 10 alarms) once block processing has finished in the respective basic cycle. The system alarms are output at the end of the basic cycle. The content of the cyclic buffer for system faults is transferred to the cyclic buffer for the message line and displayed on the monitor together with the plaintext messages (cf. monitor output/QM function). System fault messages with date and time are also transferred individually from the cyclic buffer to the output buffer for printer and bus (cf. output to printer/bus). An output logic prevents system alarms from being issued cyclically

Do you want to know about our products?

We have a large amount of inventory and high quality, out of production control system components, DCS system accessories, robot system accessories, large servo system spare parts. PLC module, DCS module, CPU module, IO module, DO module, AI module, DI module, network communication module, Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output module, redundancy module, power module, relay output module, relay input module, processor module and other major brands.