For setting 2 (coast stop), the drive will coast stop (free run) if it was running. This action clears bit #10 in the selected drive’s communication command bit structure (register 0x7A00 / 0xFA00 - also the same data as write-only coil #10 / #26) and sets bit #11 (same as coil #11 / #27). Note that the “communication command valid” bit of register 0x7A00 / 0xFA00 (bit #15 of each register, or write-only coil #15 / #31) must already be set by the master application for this timeout action to control the drive.
For setting 3 (trip “emergency off”), the drive will trip “E”. This action clears bit #10 in the selected drive’s communication command bit structure (register 0x7A00 / 0xFA00
-also the same data as write-only coil #10 / #26) and sets bit #12 (same as coil #12 / #28). Note that in this case the setting of the “communication command valid” bit of register 0x7A00 / 0xFA00 (coil #15 / #31) is irrelevant; the drive will trip regardless of its value.
Setting 4 (run a preset speed) will modify the settings of bits #0 ∼ #3 of the selected drive’s communication command bit structure (register 0x7A00 / 0xFA00 - also the same data as write-only coils #0 ∼ #3 / #16 ∼ #19). The preset speed that is to run is selected by MDB-100 registers 0x6102 (for drive A) and 0xE102 (for drive B). The possible adjustment range for these registers is 0 ∼ 15, corresponding to “no action”
(0)and each of the drive’s 15 possible preset speeds (1 ∼ 15). Note that the “communication command valid” and “run/stop” bits of register 0x7A00 / 0xFA00 (bits #15 and #10 of each register, or write-only coil #15 & #10 / #31 & #26) must already be set by the master application for this timeout action to control the drive. USE EXTREME CAUTION WHEN SELECTING THIS SETTING! Thoroughly verify that there is no possibility of personal injury or equipment damage due to the inverter running at the selected speed, especially with the possibility that network communications may not be able to be reestablished in a timely fashion (depending on what network condition caused the communications timeout in the first place).
Note that the settings of the timeout time, timeout action and timeout preset speed configuration registers are stored in the MDB-100’s nonvolatile EEPROM. Therefore, do not write to any of these registers more than 100,000 times. Also note that when the setting of any one of these configuration registers is changed, the MDB-100 must be reset for the new value to be activated and the change to take effect.
9.4 Response Delay Timer Function
Register 0x6110 contains the setting for a response delay timer function. This function is useful for applications where it may not be desirable for the MDB-100 interface to respond immediately to the network after a read/write request, such as when a radio modem that must be switched from receive mode to transmit mode is being used.
The response delay timer is adjustable in 1ms increments from 0s to 2.000s (factory setting = 0s). A response delay of 0s means that there is no delay; response packets will be sent by the MDB-100 as soon as they are available. The delay timer starts when a complete packet is received by the MDB-100, and a response will not be sent until the timer has expired (at a minimum). Note that this time value only sets a minimum response delay value - depending on the quantity and location of registers read / written, much more time may actually be required before a complete response is formulated and ready to be returned to the network.
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