5.42
Output mode for optional serial communications
Display:
O.Put
Range:
dISP, Cont, POLL
,
A.buS
or
M.buS
Default Value:
Cont
Set serial interface mode - seen only with serial output option. Refer to the separate “PM4 Panel
Meter Optional Output Addendum” booklet supplied when optional outputs are fitted. Allows
user to select the serial interface operation as follows:
disP
- sends image data from the display without conversion to ASCII.
Cont
- sends 8 bit ASCII form of display data at a rate typically 90% of the sample rate.
POLL
- controlled by computer or PLC as host.
Host sends command via RS232/485 and
instrument responds as requested.
A.buS
- is a special communications mode used with Windows compatible optional PC download
software. Refer to the user manual supplied with this optional software.
M.bus
- Modbus RTU protocol.
5.43
Instrument address for optional serial communications
Display:
Addr
Range:
0
to
31
Default Value:
0
Set unit address for polled (
POLL
) or
M.buS
mode (
0
to
31
)) - seen only with serial output
option. Refer to the separate “PM4 Panel Meter Optional Output Addendum” booklet supplied
when optional outputs are fitted. Allows several units to operate on the same RS485 interface
reporting on different areas etc. if RS485 is available. The host computer or PLC may poll each
unit in turn supplying the appropriate address. The unit address ranges from 0 to 31 (DEC) but
is offset by 32 (DEC) to avoid clashing with ASCII special function characters (such as
<
STX
>
and
<
CR
>
). Therefore 32 (DEC) or 20 (HEX) is address 0, 42 (DEC) or 2A (HEX) is address 10.
Do not use address 0 in
M.buS
mode.
5.44
Returning to normal measure mode
When the calibration has been completed it is advisable to return the instrument to the normal
mode (where calibration functions are less likely to be tampered with). To return to normal mode,
turn off power to the instrument, wait a few seconds and then restore power.
34 of
PM4BCMAN-2.0-0
Summary of Contents for PM4-BC
Page 7: ...3 5 Parallel BCD input PM4BCMAN 2 0 0 7 of 40...
Page 8: ...3 6 Strobed BCD input 8 of 40 PM4BCMAN 2 0 0...
Page 9: ...3 7 Addressed BCD input PM4BCMAN 2 0 0 9 of 40...
Page 10: ...3 8 Parallel binary input also used for Gray code 10 of 40 PM4BCMAN 2 0 0...
Page 11: ...3 9 Strobed binary input also used for Gray code PM4BCMAN 2 0 0 11 of 40...
Page 12: ...3 10 Addressed binary input also used for Gray code 12 of 40 PM4BCMAN 2 0 0...
