Diagnostic Functions; Setpoint Overrange And Underrange; Current Controller Overrange; Overload, Short Circuit - WAGO 750 Product Manual

Functions

4.7 Diagnostic Functions

4.7.1 Setpoint Overrange and Underrange

The range for the setpoint is limited to ±100 % of the nominal current. If values outside
this range are specified, then the setpoint is set to the upper or lower limiting value.

4.7.2 Current Controller Overrange

The command variable for the current controller is limited to ±20000 (corresponds to
±2 A). If a value outside this range results, then this value is not accepted and is set to
+20000 (in the event of overrange) or −20000 (in the event of underrange). The corre-
sponding LED ("Status, Channel 1" or "Status, Channel 2") then lights up red, and status
bits READY and ON_TARGET are set to "0." Furthermore, if the mailbox is enabled, a di-
agnostic message is generated.
This error case can occur if the target current and dither current exceed or fall below a
value of ±2 A.

4.7.3 Overload, Short Circuit

With a coil current of 2.3 A or above, or in the event of thermal overload, a diagnostic
message is generated and the output stage is switched off.

4.7.4 Undervoltage

If the field-side supply voltage falls below 16.9 V, then the undervoltage diagnostic mes-
sage is generated, and the output stage is switched off.

4.7.5 Overtemperature

The I/O module has internal temperature monitoring with a warning threshold and a
switch-off threshold. When the switch-off threshold is reached, the output stage is
switched off. If the temperature has dropped below the switch-off threshold, the error can
be acknowledged. The outputs can then be switched back on.

4.7.6 Wire Break

To detect wire breaks, the I/O module monitors the current and voltage on the coil. If no
minimum current is measured when the output voltage is applied, the output stage is
switched off. This also applies to 3-wire operation.

4.7.7 Fault on the Local Bus

A fault in the local bus communication is indicated by the corresponding LED.
58 Product manual | Version: 1.1.0
Proportional Valve Module 2-3-4
750-1632/000-100