Init / Normal Dip-Switch; Firmware Update Mode - ICP DAS USA GW-7238D User Manual

Apply the termination resistor(120Ω)
For other devices
2.5

Init / Normal Dip-switch

On the back of the GW-7238D module, there is a dip-switch used for
firmware operation or firmware updating in the back of the module. The
following steps show how to use this dip-switch.

2.5.1 Firmware Update Mode

Please set the dip-switch to the "Init" (Initial) position as Figure 2-11,
and then the GW-7238D will work in the "Firmware Update Mode" after
reset the power of the module. In this mode, users can update the
firmware of the GW-7238D module from computer's RS-232 port via CA-
0910 cable shown as Figure 2-13.
GW-7238D J1939 to MBTCP Server / MBRTU Slave Gateway User's Manual (Ver.1.1, May. 2013) ---
Table 2-5 J3 Jumper Selection
Table 2-6 J4 Jumper Selection
Figure 2-11: Init Position of Dip-Switch
Don't apply the termination resistor
For GW-7238D
14