Despatch P1400+ Temperature Controller - Manual (Page 52)

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8.5 Manual Control Mode
To allow manual control to be selected in Operator Mode, poen must be enabled in Set Up Mode.
Manual Mode can be selected using the front keys or by use of a digital input if one has been fitted
and configured for this function.
Selecting/deselecting Manual Control Mode
Press the key to toggle between Automatic and Manual control.
The indicator flashes continually in Manual Mode
Press or to adjust the output power to the required value.
CAUTION:
The Manual Mode power level can be adjusted from 0 to 100% (-100 to +100% for dual
output). It is not restricted by the Output Power Limit parameter
OPuL .
Note:
Disabling
poen in Set Up Mode while manual control mode is active will lock the controller into
manual mode. Pressing the Auto/Man key will no longer cause a return to automatic control. To
exit from Manual Mode,
poen must temporarily be re-enabled.
8.6 1400+ Controllers –Communications Parameters
The Modbus parameter addresses, and the possible ASCII message types and parameter indents
for the 1400+ are detailed below. RO indicates a parameter is read only, R/W indicates it can also
be written to. Communications writes will not implemented if the Communications Write Parameter is
disabled. Refer to the Modbus and ASCII Communications sections of this manual for details of the
protocols used.
Bit Parameters
Bit parameters are not applicable to the ASCII protocol.
Table 13. 1400+ Communications - Bit Parameters
Parameter Modbus
Parameter No.
Notes
Communication
Write Status 1 RO 1 = Write Enabled, 0 = Write Disabled. A negative
acknowledgement (exception code 3) is sent to write
commands if communications writes are disabled
Auto / Manual 2 R/W 1 = Manual Control, 0 = Automatic Control
Self Tune 3 R/W 1 = Activate(d), 0 = Dis-engage(d)
Pre tune 4 R/W 1 = Activate(d), 0 = Dis-engage(d)