Honeywell 10004/I/F Pulse link card

Monitoring the dynamic binary input: – The I/O modules for process signal acquisition with interrupt initiate a permanent group interrupt if a fuse has tripped. They thus generate at least one interrupt in the group interrupt module and, in addition, are detected as interrupt–generating binary input with every new interrupt. The subsequent BEI driver in the AS 235 subsystem recognizes a tripped fuse by time– out. An I&C fault alarm is issued and the driver’s BGF block output is set to “1”. The time– out can be clearled by switching off the associated driver via XB, for example (or by replacing the module).

No more interrupts may be initiated 

by the group interrupt module SF 61 if a fuse trips. A cyclic monitoring function in the system checks this module for tripped fuses. The function can be switched on by setting GB.ORPA.225 = ”1” (= ”0” switched off) . The system message S 323 is issued if a fault occurs. The monitoring function checks I/O address 61 (group interrupt module) for time–out and multiple addressing. GB.ORPA.10 is set up to ”1” (ORed) in case of an error. Further processing is performed via standard or user function blocks.

Process alarm acquisition using 6DS1 601/6DS1 615 

Both the group interrupt module (master) and the common alarm modules (slave) are designed for signal edge interpretation. A signal which was already active during commissioning is therefore not able to trigger a common alarm or an interrupt. Each activation after commissioning also initiates acquisition of previously existing signals.

Group interrupt module (master) 

The interrupt is activated by the next common alarm 1 to 48 once module no. 61 has been switched on. If this time interval is too long, a free input must dynamically be connected (e.g. via a pushbutton) to PS potential (= 24-V level). This triggers an interrupt at the CPU which initiates immediate processing of pending common alarms. Removing and re–installing the fuse of a common alarm module (slave) is an alternative method. However, the module should not have activated a common alarm when this is done. If the common alarm of all slave common alarm modules is active during commissioning, the group interrupt module can only be activated via a free input or by switching the rack fuse (L+) of an associated extension unit off and back on.

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