Emerson Micro-Motion 2400S, Configuration And Use Manual, Page: 98 / 198

90 Micro Motion
®
Model 2400S Transmitters with Analog Outputs
Optional Configuration
8.11.2 Infrared port write-protection
The infrared port (IrDA) on the display can be write-protected or released from write-protection. To
do this:
• Using ProLink II, see Figure C-3.
• Using the Communicator, see Figure C-5.
• Using the display menus, see Figure C-14.
8.11.3 Floating-point byte order
Four bytes are used to transmit floating-point values. For contents of bytes, see Table 8-10.
The default byte order for the Model 2400S transmitter is 3–4–1–2. You may need to reset byte order
to match the byte order used by a remote host or PLC. Byte order codes are listed in Table 8-11.
To configure byte order using ProLink II, see Figure C-3.
Note: This parameter affects only Modbus communications. HART communications are not changed.
Note: This functionality is not available via the display menus or the Communicator.
8.11.4 Additional communications response delay
Some hosts or PLCs operate at slower speeds than the transmitter. In order to synchronize
communication with these devices, you can configure an additional time delay to be added to each
response the transmitter sends to the remote host.
Note: This parameter affects only Modbus communications. HART communications are not changed.
The basic unit of delay is in terms of 2/3 of one character time as calculated for the current serial port
baud rate setting and character transmission parameters. This basic delay unit is multiplied by the
configured value to arrive at the total additional time delay. You can specify a value in the range 1 to
255.
To configure additional communications response delay using ProLink II, see Figure C-3.
Table 8-10 Byte contents in Modbus commands and responses
Byte Bits Definitions
1 S E E E E E E E S = Sign
E = Exponent
2 E M M M M M M M E = Exponent
M = Mantissa
3 M M M M M M M M M = Mantissa
4 M M M M M M M M M = Mantissa
Table 8-11 Byte order codes and byte orders
Byte order code Byte order
0 1
–
2
–
3
–
4
1 3
–
4
–
1
–
2
2 2
–
1
–
4
–
3
3 4
–
3
–
2
–
1